45720979 has 4 divisors (see below), whose sum is σ = 46164976. Its totient is φ = 45276984.

The previous prime is 45720977. The next prime is 45721009. The reversal of 45720979 is 97902754.

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 45720979 - 2¹ = 45720977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45720971) 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, 221844 + ... + 222049.

It is an arithmetic number, because the mean of its divisors is an integer number (11541244).

Almost surely, 2^45720979 is an apocalyptic number.

45720979 is a deficient number, since it is larger than the sum of its proper divisors (443997).

45720979 is a wasteful number, since it uses less digits than its factorization.

45720979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443996.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 45720979 is about 6761.7289948651. The cubic root of 45720979 is about 357.5788640463.

The spelling of 45720979 in words is "forty-five million, seven hundred twenty thousand, nine hundred seventy-nine".