384636731 has 2 divisors, whose sum is σ = 384636732. Its totient is φ = 384636730.

The previous prime is 384636727. The next prime is 384636743. The reversal of 384636731 is 137636483.

It is a weak prime.

It is an emirp because it is prime and its reverse (137636483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384636731 - 2² = 384636727 is a prime.

It is a super-2 number, since 2×384636731² = 295890829668732722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (384606731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192318365 + 192318366.

It is an arithmetic number, because the mean of its divisors is an integer number (192318366).

Almost surely, 2^384636731 is an apocalyptic number.

384636731 is a deficient number, since it is larger than the sum of its proper divisors (1).

384636731 is an equidigital number, since it uses as much as digits as its factorization.

384636731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 41.

The square root of 384636731 is about 19612.1577344259. The cubic root of 384636731 is about 727.2497573053.

The spelling of 384636731 in words is "three hundred eighty-four million, six hundred thirty-six thousand, seven hundred thirty-one".