386744989 has 2 divisors, whose sum is σ = 386744990. Its totient is φ = 386744988.

The previous prime is 386744959. The next prime is 386745001. The reversal of 386744989 is 989447683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386436964 + 308025 = 19658^2 + 555^2 .

It is a cyclic number.

It is not a de Polignac number, because 386744989 - 2²⁵ = 353190557 is a prime.

It is a super-2 number, since 2×386744989² = 299143373033220242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386744929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193372494 + 193372495.

It is an arithmetic number, because the mean of its divisors is an integer number (193372495).

Almost surely, 2^386744989 is an apocalyptic number.

It is an amenable number.

386744989 is a deficient number, since it is larger than the sum of its proper divisors (1).

386744989 is an equidigital number, since it uses as much as digits as its factorization.

386744989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 386744989 is about 19665.8330360043. The cubic root of 386744989 is about 728.5760627065.

The spelling of 386744989 in words is "three hundred eighty-six million, seven hundred forty-four thousand, nine hundred eighty-nine".