45405979 has 16 divisors (see below), whose sum is σ = 50079744. Its totient is φ = 41025600.

The previous prime is 45405977. The next prime is 45406019. The reversal of 45405979 is 97950454.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 45405979 - 2¹ = 45405977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45405977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29919 + ... + 31399.

It is an arithmetic number, because the mean of its divisors is an integer number (3129984).

Almost surely, 2^45405979 is an apocalyptic number.

45405979 is a deficient number, since it is larger than the sum of its proper divisors (4673765).

45405979 is a wasteful number, since it uses less digits than its factorization.

45405979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 45405979 is about 6738.3958773583. The cubic root of 45405979 is about 356.7557771736.

The spelling of 45405979 in words is "forty-five million, four hundred five thousand, nine hundred seventy-nine".