257033983 has 2 divisors, whose sum is σ = 257033984. Its totient is φ = 257033982.

The previous prime is 257033923. The next prime is 257034013. The reversal of 257033983 is 389330752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257033983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257033923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128516991 + 128516992.

It is an arithmetic number, because the mean of its divisors is an integer number (128516992).

Almost surely, 2^257033983 is an apocalyptic number.

257033983 is a deficient number, since it is larger than the sum of its proper divisors (1).

257033983 is an equidigital number, since it uses as much as digits as its factorization.

257033983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 257033983 is about 16032.2794074954. The cubic root of 257033983 is about 635.8141399804.

The spelling of 257033983 in words is "two hundred fifty-seven million, thirty-three thousand, nine hundred eighty-three".