386740631 has 2 divisors, whose sum is σ = 386740632. Its totient is φ = 386740630.

The previous prime is 386740567. The next prime is 386740639. The reversal of 386740631 is 136047683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 386740631 - 2⁶ = 386740567 is a prime.

It is a super-2 number, since 2×386740631² = 299136631332556322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386740639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193370315 + 193370316.

It is an arithmetic number, because the mean of its divisors is an integer number (193370316).

Almost surely, 2^386740631 is an apocalyptic number.

386740631 is a deficient number, since it is larger than the sum of its proper divisors (1).

386740631 is an equidigital number, since it uses as much as digits as its factorization.

386740631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 386740631 is about 19665.7222343854. The cubic root of 386740631 is about 728.5733260656.

The spelling of 386740631 in words is "three hundred eighty-six million, seven hundred forty thousand, six hundred thirty-one".