69489139 has 4 divisors (see below), whose sum is σ = 69650056. Its totient is φ = 69328224.

The previous prime is 69489127. The next prime is 69489163. The reversal of 69489139 is 93198496.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 69489139 - 2⁵ = 69489107 is a prime.

It is a super-2 number, since 2×69489139² = 9657480877922642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69489092 and 69489101.

It is not an unprimeable number, because it can be changed into a prime (69489169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79809 + ... + 80674.

It is an arithmetic number, because the mean of its divisors is an integer number (17412514).

Almost surely, 2^69489139 is an apocalyptic number.

69489139 is a deficient number, since it is larger than the sum of its proper divisors (160917).

69489139 is a wasteful number, since it uses less digits than its factorization.

69489139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160916.

The product of its digits is 419904, while the sum is 49.

The square root of 69489139 is about 8336.0145753232. The cubic root of 69489139 is about 411.1235078127.

The spelling of 69489139 in words is "sixty-nine million, four hundred eighty-nine thousand, one hundred thirty-nine".