69672409 has 9 divisors (see below), whose sum is σ = 74162911. Its totient is φ = 65440480.

The previous prime is 69672403. The next prime is 69672419. The reversal of 69672409 is 90427696.

The square root of 69672409 is 8347.

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

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 15429184 = 7365^2 + 3928^2 .

It is not a de Polignac number, because 69672409 - 2³ = 69672401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69672401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 141654 + ... + 142144.

Almost surely, 2^69672409 is an apocalyptic number.

69672409 is the 8347-th square number.

69672409 is the 4174-th centered octagonal number.

It is an amenable number.

69672409 is a deficient number, since it is larger than the sum of its proper divisors (4490502).

69672409 is an frugal number, since it uses more digits than its factorization.

69672409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The cubic root of 69672409 is about 411.4846216202.

The spelling of 69672409 in words is "sixty-nine million, six hundred seventy-two thousand, four hundred nine".