40559979 has 4 divisors (see below), whose sum is σ = 54079976. Its totient is φ = 27039984.

The previous prime is 40559929. The next prime is 40559989. The reversal of 40559979 is 97995504.

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

It is not a de Polignac number, because 40559979 - 2¹² = 40555883 is a prime.

It is a super-2 number, since 2×40559979² = 3290223792960882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40559929) 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, 6759994 + ... + 6759999.

It is an arithmetic number, because the mean of its divisors is an integer number (13519994).

Almost surely, 2^40559979 is an apocalyptic number.

40559979 is a deficient number, since it is larger than the sum of its proper divisors (13519997).

40559979 is a wasteful number, since it uses less digits than its factorization.

40559979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519996.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 40559979 is about 6368.6716825410. The cubic root of 40559979 is about 343.5837170862.

The spelling of 40559979 in words is "forty million, five hundred fifty-nine thousand, nine hundred seventy-nine".