40119979 has 4 divisors (see below), whose sum is σ = 40141440. Its totient is φ = 40098520.

The previous prime is 40119977. The next prime is 40119991. The reversal of 40119979 is 97991104.

It is a happy number.

40119979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40119979 - 2¹ = 40119977 is a prime.

It is a super-2 number, since 2×40119979² = 3219225429920882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40119973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7627 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (10035360).

Almost surely, 2^40119979 is an apocalyptic number.

40119979 is a deficient number, since it is larger than the sum of its proper divisors (21461).

40119979 is a wasteful number, since it uses less digits than its factorization.

40119979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21460.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 40119979 is about 6334.0333911340. The cubic root of 40119979 is about 342.3367833686.

The spelling of 40119979 in words is "forty million, one hundred nineteen thousand, nine hundred seventy-nine".