40918979 has 4 divisors (see below), whose sum is σ = 40943784. Its totient is φ = 40894176.

The previous prime is 40918973. The next prime is 40918981. The reversal of 40918979 is 97981904.

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 40918979 - 2⁴ = 40918963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40918973) 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, 9737 + ... + 13290.

It is an arithmetic number, because the mean of its divisors is an integer number (10235946).

Almost surely, 2^40918979 is an apocalyptic number.

40918979 is a deficient number, since it is larger than the sum of its proper divisors (24805).

40918979 is a wasteful number, since it uses less digits than its factorization.

40918979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24804.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 40918979 is about 6396.7944315884. The cubic root of 40918979 is about 344.5944376646.

The spelling of 40918979 in words is "forty million, nine hundred eighteen thousand, nine hundred seventy-nine".