257703653 has 2 divisors, whose sum is σ = 257703654. Its totient is φ = 257703652.

The previous prime is 257703647. The next prime is 257703673. The reversal of 257703653 is 356307752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196504324 + 61199329 = 14018^2 + 7823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257703653 is a prime.

It is a super-2 number, since 2×257703653² = 132822345539088818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257703623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128851826 + 128851827.

It is an arithmetic number, because the mean of its divisors is an integer number (128851827).

Almost surely, 2^257703653 is an apocalyptic number.

It is an amenable number.

257703653 is a deficient number, since it is larger than the sum of its proper divisors (1).

257703653 is an equidigital number, since it uses as much as digits as its factorization.

257703653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 38.

The square root of 257703653 is about 16053.1508745168. The cubic root of 257703653 is about 636.3658392892.

The spelling of 257703653 in words is "two hundred fifty-seven million, seven hundred three thousand, six hundred fifty-three".