381366957 has 16 divisors (see below), whose sum is σ = 521533760. Its totient is φ = 247750272.

The previous prime is 381366943. The next prime is 381366971. The reversal of 381366957 is 759663183.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (381366943) and next prime (381366971).

It is not a de Polignac number, because 381366957 - 2⁴ = 381366941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381367957) 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 in 15 ways as a sum of consecutive naturals, for example, 55719 + ... + 62187.

It is an arithmetic number, because the mean of its divisors is an integer number (32595860).

Almost surely, 2^381366957 is an apocalyptic number.

It is an amenable number.

381366957 is a deficient number, since it is larger than the sum of its proper divisors (140166803).

381366957 is a wasteful number, since it uses less digits than its factorization.

381366957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972.

The product of its digits is 816480, while the sum is 48.

The square root of 381366957 is about 19528.6189219822. The cubic root of 381366957 is about 725.1831210837.

The spelling of 381366957 in words is "three hundred eighty-one million, three hundred sixty-six thousand, nine hundred fifty-seven".