394305977 has 8 divisors (see below), whose sum is σ = 424818240. Its totient is φ = 363819600.

The previous prime is 394305937. The next prime is 394306009. The reversal of 394305977 is 779503493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394305977 - 2¹² = 394301881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394305907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35102 + ... + 44952.

It is an arithmetic number, because the mean of its divisors is an integer number (53102280).

Almost surely, 2^394305977 is an apocalyptic number.

It is an amenable number.

394305977 is a deficient number, since it is larger than the sum of its proper divisors (30512263).

394305977 is a wasteful number, since it uses less digits than its factorization.

394305977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12943.

The product of its (nonzero) digits is 714420, while the sum is 47.

The square root of 394305977 is about 19857.1391947581. The cubic root of 394305977 is about 733.2934179147.

The spelling of 394305977 in words is "three hundred ninety-four million, three hundred five thousand, nine hundred seventy-seven".