386402389 has 2 divisors, whose sum is σ = 386402390. Its totient is φ = 386402388.

The previous prime is 386402381. The next prime is 386402399. The reversal of 386402389 is 983204683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355511025 + 30891364 = 18855^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 386402389 - 2³ = 386402381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386402381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193201194 + 193201195.

It is an arithmetic number, because the mean of its divisors is an integer number (193201195).

Almost surely, 2^386402389 is an apocalyptic number.

It is an amenable number.

386402389 is a deficient number, since it is larger than the sum of its proper divisors (1).

386402389 is an equidigital number, since it uses as much as digits as its factorization.

386402389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 386402389 is about 19657.1205673669. The cubic root of 386402389 is about 728.3608615544.

The spelling of 386402389 in words is "three hundred eighty-six million, four hundred two thousand, three hundred eighty-nine".