257136937 has 8 divisors (see below), whose sum is σ = 274484160. Its totient is φ = 240171120.

The previous prime is 257136889. The next prime is 257136959. The reversal of 257136937 is 739631752.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 257136937 - 2²³ = 248748329 is a prime.

It is a super-2 number, since 2×257136937² = 132238808739483938, 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 = 257136893 and 257136902.

It is not an unprimeable number, because it can be changed into a prime (257136967) 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, 93958 + ... + 96655.

It is an arithmetic number, because the mean of its divisors is an integer number (34310520).

Almost surely, 2^257136937 is an apocalyptic number.

It is an amenable number.

257136937 is a deficient number, since it is larger than the sum of its proper divisors (17347223).

257136937 is a wasteful number, since it uses less digits than its factorization.

257136937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190703.

The product of its digits is 238140, while the sum is 43.

The square root of 257136937 is about 16035.4899207976. The cubic root of 257136937 is about 635.8990196402.

The spelling of 257136937 in words is "two hundred fifty-seven million, one hundred thirty-six thousand, nine hundred thirty-seven".