384690731 has 2 divisors, whose sum is σ = 384690732. Its totient is φ = 384690730.

The previous prime is 384690721. The next prime is 384690767. The reversal of 384690731 is 137096483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 384690731 - 2¹⁰ = 384689707 is a prime.

It is a super-2 number, since 2×384690731² = 295973917034628722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (384690721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192345365 + 192345366.

It is an arithmetic number, because the mean of its divisors is an integer number (192345366).

Almost surely, 2^384690731 is an apocalyptic number.

384690731 is a deficient number, since it is larger than the sum of its proper divisors (1).

384690731 is an equidigital number, since it uses as much as digits as its factorization.

384690731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 384690731 is about 19613.5343831753. The cubic root of 384690731 is about 727.2837891125.

The spelling of 384690731 in words is "three hundred eighty-four million, six hundred ninety thousand, seven hundred thirty-one".