392960989 has 2 divisors, whose sum is σ = 392960990. Its totient is φ = 392960988.

The previous prime is 392960969. The next prime is 392960999. The reversal of 392960989 is 989069293.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261468900 + 131492089 = 16170^2 + 11467^2 .

It is a cyclic number.

It is not a de Polignac number, because 392960989 - 2⁷ = 392960861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (392960959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196480494 + 196480495.

It is an arithmetic number, because the mean of its divisors is an integer number (196480495).

Almost surely, 2^392960989 is an apocalyptic number.

It is an amenable number.

392960989 is a deficient number, since it is larger than the sum of its proper divisors (1).

392960989 is an equidigital number, since it uses as much as digits as its factorization.

392960989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The square root of 392960989 is about 19823.2436548613. The cubic root of 392960989 is about 732.4587071117.

The spelling of 392960989 in words is "three hundred ninety-two million, nine hundred sixty thousand, nine hundred eighty-nine".