507857381 has 2 divisors, whose sum is σ = 507857382. Its totient is φ = 507857380.

The previous prime is 507857333. The next prime is 507857393. The reversal of 507857381 is 183758705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 362293156 + 145564225 = 19034^2 + 12065^2 .

It is a cyclic number.

It is not a de Polignac number, because 507857381 - 2¹⁸ = 507595237 is a prime.

It is a super-2 number, since 2×507857381² = 515838238872358322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (507857321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253928690 + 253928691.

It is an arithmetic number, because the mean of its divisors is an integer number (253928691).

Almost surely, 2^507857381 is an apocalyptic number.

It is an amenable number.

507857381 is a deficient number, since it is larger than the sum of its proper divisors (1).

507857381 is an equidigital number, since it uses as much as digits as its factorization.

507857381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 235200, while the sum is 44.

The square root of 507857381 is about 22535.6912696283. The cubic root of 507857381 is about 797.8365405154.

The spelling of 507857381 in words is "five hundred seven million, eight hundred fifty-seven thousand, three hundred eighty-one".