405968679 has 12 divisors (see below), whose sum is σ = 608118056. Its totient is φ = 270645624.

The previous prime is 405968671. The next prime is 405968683. The reversal of 405968679 is 976869504.

405968679 is a `hidden beast` number, since 40 + 596 + 8 + 6 + 7 + 9 = 666.

It is not a de Polignac number, because 405968679 - 2³ = 405968671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405968671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 835084 + ... + 835569.

Almost surely, 2^405968679 is an apocalyptic number.

405968679 is a deficient number, since it is larger than the sum of its proper divisors (202149377).

405968679 is an equidigital number, since it uses as much as digits as its factorization.

405968679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670668 (or 1670656 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 405968679 is about 20148.6644470545. The cubic root of 405968679 is about 740.4530212444.

The spelling of 405968679 in words is "four hundred five million, nine hundred sixty-eight thousand, six hundred seventy-nine".