69072057 has 6 divisors (see below), whose sum is σ = 99770762. Its totient is φ = 46048032.

The previous prime is 69072053. The next prime is 69072077. The reversal of 69072057 is 75027096.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 2143296 = 8181^2 + 1464^2 .

It is not a de Polignac number, because 69072057 - 2² = 69072053 is a prime.

It is a super-2 number, since 2×69072057² = 9541898116422498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69072053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3837328 + ... + 3837345.

Almost surely, 2^69072057 is an apocalyptic number.

It is an amenable number.

69072057 is a deficient number, since it is larger than the sum of its proper divisors (30698705).

69072057 is a wasteful number, since it uses less digits than its factorization.

69072057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674679 (or 7674676 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 69072057 is about 8310.9600528459. The cubic root of 69072057 is about 410.2993194029.

The spelling of 69072057 in words is "sixty-nine million, seventy-two thousand, fifty-seven".