399294561 has 8 divisors (see below), whose sum is σ = 532859904. Its totient is φ = 265962800.

The previous prime is 399294551. The next prime is 399294569. The reversal of 399294561 is 165492993.

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 399294561 - 2⁵ = 399294529 is a prime.

It is a super-2 number, since 2×399294561² = 318872292888365442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 399294561.

It is not an unprimeable number, because it can be changed into a prime (399294569) 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, 54366 + ... + 61271.

It is an arithmetic number, because the mean of its divisors is an integer number (66607488).

Almost surely, 2^399294561 is an apocalyptic number.

It is an amenable number.

399294561 is a deficient number, since it is larger than the sum of its proper divisors (133565343).

399294561 is a wasteful number, since it uses less digits than its factorization.

399294561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116791.

The product of its digits is 524880, while the sum is 48.

The square root of 399294561 is about 19982.3562424455. The cubic root of 399294561 is about 736.3729015988.

The spelling of 399294561 in words is "three hundred ninety-nine million, two hundred ninety-four thousand, five hundred sixty-one".