257953949 has 8 divisors (see below), whose sum is σ = 282820800. Its totient is φ = 233323200.

The previous prime is 257953939. The next prime is 257953961. The reversal of 257953949 is 949359752.

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

It is not a de Polignac number, because 257953949 - 2⁸ = 257953693 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257953949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257953909) 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, 56732 + ... + 61109.

It is an arithmetic number, because the mean of its divisors is an integer number (35352600).

Almost surely, 2^257953949 is an apocalyptic number.

It is an amenable number.

257953949 is a deficient number, since it is larger than the sum of its proper divisors (24866851).

257953949 is a wasteful number, since it uses less digits than its factorization.

257953949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118051.

The product of its digits is 3061800, while the sum is 53.

The square root of 257953949 is about 16060.9448352206. The cubic root of 257953949 is about 636.5717971572.

The spelling of 257953949 in words is "two hundred fifty-seven million, nine hundred fifty-three thousand, nine hundred forty-nine".