257169953 has 2 divisors, whose sum is σ = 257169954. Its totient is φ = 257169952.

The previous prime is 257169949. The next prime is 257170003. The reversal of 257169953 is 359961752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203689984 + 53479969 = 14272^2 + 7313^2 .

It is a cyclic number.

It is not a de Polignac number, because 257169953 - 2² = 257169949 is a prime.

It is a super-2 number, since 2×257169953² = 132272769452044418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257169898 and 257169907.

It is not a weakly prime, because it can be changed into another prime (257169053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128584976 + 128584977.

It is an arithmetic number, because the mean of its divisors is an integer number (128584977).

Almost surely, 2^257169953 is an apocalyptic number.

It is an amenable number.

257169953 is a deficient number, since it is larger than the sum of its proper divisors (1).

257169953 is an equidigital number, since it uses as much as digits as its factorization.

257169953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 47.

The square root of 257169953 is about 16036.5193542739. The cubic root of 257169953 is about 635.9262346380.

It can be divided in two parts, 2571699 and 53, that added together give a palindrome (2571752).

The spelling of 257169953 in words is "two hundred fifty-seven million, one hundred sixty-nine thousand, nine hundred fifty-three".