400979 has 8 divisors (see below), whose sum is σ = 430560. Its totient is φ = 372096.

The previous prime is 400963. The next prime is 400997. The reversal of 400979 is 979004.

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

It is not a de Polignac number, because 400979 - 2⁴ = 400963 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 (400949) 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, 1637 + ... + 1865.

It is an arithmetic number, because the mean of its divisors is an integer number (53820).

2⁴⁰⁰⁹⁷⁹ is an apocalyptic number.

400979 is a deficient number, since it is larger than the sum of its proper divisors (29581).

400979 is a wasteful number, since it uses less digits than its factorization.

400979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 400979 is about 633.2290264983. The cubic root of 400979 is about 73.7406921127.

The spelling of 400979 in words is "four hundred thousand, nine hundred seventy-nine".