396920977 has 2 divisors, whose sum is σ = 396920978. Its totient is φ = 396920976.

The previous prime is 396920957. The next prime is 396920983. The reversal of 396920977 is 779029693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271458576 + 125462401 = 16476^2 + 11201^2 .

It is a cyclic number.

It is not a de Polignac number, because 396920977 - 2²³ = 388532369 is a prime.

It is not a weakly prime, because it can be changed into another prime (396920957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198460488 + 198460489.

It is an arithmetic number, because the mean of its divisors is an integer number (198460489).

Almost surely, 2^396920977 is an apocalyptic number.

It is an amenable number.

396920977 is a deficient number, since it is larger than the sum of its proper divisors (1).

396920977 is an equidigital number, since it uses as much as digits as its factorization.

396920977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 396920977 is about 19922.8757211403. The cubic root of 396920977 is about 734.9108917534.

The spelling of 396920977 in words is "three hundred ninety-six million, nine hundred twenty thousand, nine hundred seventy-seven".