386765989 has 2 divisors, whose sum is σ = 386765990. Its totient is φ = 386765988.

The previous prime is 386765983. The next prime is 386765993. The reversal of 386765989 is 989567683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345588100 + 41177889 = 18590^2 + 6417^2 .

It is a cyclic number.

It is not a de Polignac number, because 386765989 - 2¹⁷ = 386634917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386765983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193382994 + 193382995.

It is an arithmetic number, because the mean of its divisors is an integer number (193382995).

Almost surely, 2^386765989 is an apocalyptic number.

It is an amenable number.

386765989 is a deficient number, since it is larger than the sum of its proper divisors (1).

386765989 is an equidigital number, since it uses as much as digits as its factorization.

386765989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 61.

The square root of 386765989 is about 19666.3669496936. The cubic root of 386765989 is about 728.5892495357.

The spelling of 386765989 in words is "three hundred eighty-six million, seven hundred sixty-five thousand, nine hundred eighty-nine".