257098147 has 2 divisors, whose sum is σ = 257098148. Its totient is φ = 257098146.

The previous prime is 257098141. The next prime is 257098181. The reversal of 257098147 is 741890752.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257098147 is a prime.

It is not a weakly prime, because it can be changed into another prime (257098141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128549073 + 128549074.

It is an arithmetic number, because the mean of its divisors is an integer number (128549074).

Almost surely, 2^257098147 is an apocalyptic number.

257098147 is a deficient number, since it is larger than the sum of its proper divisors (1).

257098147 is an equidigital number, since it uses as much as digits as its factorization.

257098147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 257098147 is about 16034.2803705062. The cubic root of 257098147 is about 635.8670421736.

It can be divided in two parts, 25709 and 8147, that added together give a square (33856 = 184²).

The spelling of 257098147 in words is "two hundred fifty-seven million, ninety-eight thousand, one hundred forty-seven".