394977961 has 16 divisors (see below), whose sum is σ = 458800000. Its totient is φ = 333030528.

The previous prime is 394977953. The next prime is 394977967. The reversal of 394977961 is 169779493.

It is a cyclic number.

It is not a de Polignac number, because 394977961 - 2³ = 394977953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394977967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254215 + ... + 255763.

It is an arithmetic number, because the mean of its divisors is an integer number (28675000).

Almost surely, 2^394977961 is an apocalyptic number.

It is an amenable number.

394977961 is a deficient number, since it is larger than the sum of its proper divisors (63822039).

394977961 is a wasteful number, since it uses less digits than its factorization.

394977961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128.

The product of its digits is 2571912, while the sum is 55.

The square root of 394977961 is about 19874.0524554002. The cubic root of 394977961 is about 733.7097458537.

The spelling of 394977961 in words is "three hundred ninety-four million, nine hundred seventy-seven thousand, nine hundred sixty-one".