69724057 has 8 divisors (see below), whose sum is σ = 76039040. Its totient is φ = 63545040.

The previous prime is 69724049. The next prime is 69724079. The reversal of 69724057 is 75042796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 69724057 - 2³ = 69724049 is a prime.

It is a super-2 number, since 2×69724057² = 9722888249078498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69724087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32919 + ... + 34972.

It is an arithmetic number, because the mean of its divisors is an integer number (9504880).

Almost surely, 2^69724057 is an apocalyptic number.

It is an amenable number.

69724057 is a deficient number, since it is larger than the sum of its proper divisors (6314983).

69724057 is a wasteful number, since it uses less digits than its factorization.

69724057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67983.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 69724057 is about 8350.0932330124. The cubic root of 69724057 is about 411.5862740474.

The spelling of 69724057 in words is "sixty-nine million, seven hundred twenty-four thousand, fifty-seven".