40810979 has 4 divisors (see below), whose sum is σ = 44521080. Its totient is φ = 37100880.

The previous prime is 40810961. The next prime is 40811003. The reversal of 40810979 is 97901804.

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

It is a cyclic number.

It is not a de Polignac number, because 40810979 - 2²⁰ = 39762403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40810909) 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, 1855034 + ... + 1855055.

It is an arithmetic number, because the mean of its divisors is an integer number (11130270).

Almost surely, 2^40810979 is an apocalyptic number.

40810979 is a deficient number, since it is larger than the sum of its proper divisors (3710101).

40810979 is a wasteful number, since it uses less digits than its factorization.

40810979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710100.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 40810979 is about 6388.3471258221. The cubic root of 40810979 is about 344.2910007215.

The spelling of 40810979 in words is "forty million, eight hundred ten thousand, nine hundred seventy-nine".