69997257 has 32 divisors (see below), whose sum is σ = 118056960. Its totient is φ = 40574160.

The previous prime is 69997243. The next prime is 69997261. The reversal of 69997257 is 75279996.

It is not a de Polignac number, because 69997257 - 2⁸ = 69997001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69997457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1708 + ... + 11954.

It is an arithmetic number, because the mean of its divisors is an integer number (3689280).

Almost surely, 2^69997257 is an apocalyptic number.

It is an amenable number.

69997257 is a deficient number, since it is larger than the sum of its proper divisors (48059703).

69997257 is a wasteful number, since it uses less digits than its factorization.

69997257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10290 (or 10284 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 69997257 is about 8366.4363381311. The cubic root of 69997257 is about 412.1231467269.

The spelling of 69997257 in words is "sixty-nine million, nine hundred ninety-seven thousand, two hundred fifty-seven".