405359979 has 8 divisors (see below), whose sum is σ = 540687312. Its totient is φ = 270136320.

The previous prime is 405359963. The next prime is 405360047. The reversal of 405359979 is 979953504.

It is a happy number.

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

It is not a de Polignac number, because 405359979 - 2⁴ = 405359963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405359909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16282 + ... + 32799.

It is an arithmetic number, because the mean of its divisors is an integer number (67585914).

Almost surely, 2^405359979 is an apocalyptic number.

405359979 is a deficient number, since it is larger than the sum of its proper divisors (135327333).

405359979 is a wasteful number, since it uses less digits than its factorization.

405359979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51837.

The product of its (nonzero) digits is 1530900, while the sum is 51.

The square root of 405359979 is about 20133.5535611576. The cubic root of 405359979 is about 740.0827634483.

The spelling of 405359979 in words is "four hundred five million, three hundred fifty-nine thousand, nine hundred seventy-nine".