386231969 has 2 divisors, whose sum is σ = 386231970. Its totient is φ = 386231968.

The previous prime is 386231957. The next prime is 386231999. The reversal of 386231969 is 969132683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277655569 + 108576400 = 16663^2 + 10420^2 .

It is an emirp because it is prime and its reverse (969132683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 386231969 - 2⁴ = 386231953 is a prime.

It is a super-2 number, since 2×386231969² = 298350267755233922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (386231999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193115984 + 193115985.

It is an arithmetic number, because the mean of its divisors is an integer number (193115985).

Almost surely, 2^386231969 is an apocalyptic number.

It is an amenable number.

386231969 is a deficient number, since it is larger than the sum of its proper divisors (1).

386231969 is an equidigital number, since it uses as much as digits as its factorization.

386231969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 386231969 is about 19652.7852733398. The cubic root of 386231969 is about 728.2537663652.

The spelling of 386231969 in words is "three hundred eighty-six million, two hundred thirty-one thousand, nine hundred sixty-nine".