394335961 has 4 divisors (see below), whose sum is σ = 417532212. Its totient is φ = 371139712.

The previous prime is 394335959. The next prime is 394335971. The reversal of 394335961 is 169533493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162078361 + 232257600 = 12731^2 + 15240^2 .

It is a cyclic number.

It is not a de Polignac number, because 394335961 - 2¹ = 394335959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394335941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11598100 + ... + 11598133.

It is an arithmetic number, because the mean of its divisors is an integer number (104383053).

Almost surely, 2^394335961 is an apocalyptic number.

It is an amenable number.

394335961 is a deficient number, since it is larger than the sum of its proper divisors (23196251).

394335961 is a wasteful number, since it uses less digits than its factorization.

394335961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23196250.

The product of its digits is 262440, while the sum is 43.

The square root of 394335961 is about 19857.8941733508. The cubic root of 394335961 is about 733.3120045909.

The spelling of 394335961 in words is "three hundred ninety-four million, three hundred thirty-five thousand, nine hundred sixty-one".