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BaseRepresentation
bin1000001111101…
…11110100001001
311211011022211001
410013313310021
5120202004424
610510335001
71466646031
oct407676411
9154138731
1069172489
1136056351
121b1ba461
131143bc89
1492888c1
156115844
hex41f7d09

69172489 has 3 divisors (see below), whose sum is σ = 69180807. Its totient is φ = 69164172.

The previous prime is 69172469. The next prime is 69172513. The reversal of 69172489 is 98427196.

The square root of 69172489 is 8317.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 1192464 = 8245^2 + 1092^2 .

It is not a de Polignac number, because 69172489 - 211 = 69170441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69172429) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4159 + ... + 12475.

It is an arithmetic number, because the mean of its divisors is an integer number (23060269).

Almost surely, 269172489 is an apocalyptic number.

69172489 is the 8317-th square number.

69172489 is the 4159-th centered octagonal number.

It is an amenable number.

69172489 is a deficient number, since it is larger than the sum of its proper divisors (8318).

69172489 is an frugal number, since it uses more digits than its factorization.

69172489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16634 (or 8317 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The cubic root of 69172489 is about 410.4980839355.

The spelling of 69172489 in words is "sixty-nine million, one hundred seventy-two thousand, four hundred eighty-nine".

Divisors: 1 8317 69172489