381876731 has 2 divisors, whose sum is σ = 381876732. Its totient is φ = 381876730.

The previous prime is 381876689. The next prime is 381876749. The reversal of 381876731 is 137678183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381876731 - 2²⁶ = 314767867 is a prime.

It is a super-2 number, since 2×381876731² = 291659675358492722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381876331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190938365 + 190938366.

It is an arithmetic number, because the mean of its divisors is an integer number (190938366).

Almost surely, 2^381876731 is an apocalyptic number.

381876731 is a deficient number, since it is larger than the sum of its proper divisors (1).

381876731 is an equidigital number, since it uses as much as digits as its factorization.

381876731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 381876731 is about 19541.6665358920. Note that the first 3 decimals coincide. The cubic root of 381876731 is about 725.5060951455.

The spelling of 381876731 in words is "three hundred eighty-one million, eight hundred seventy-six thousand, seven hundred thirty-one".