45713921 has 6 divisors (see below), whose sum is σ = 50247666. Its totient is φ = 41558000.

The previous prime is 45713909. The next prime is 45713929. The reversal of 45713921 is 12931754.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 21752896 = 4895^2 + 4664^2 .

It is not a de Polignac number, because 45713921 - 2¹⁰ = 45712897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45713929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188780 + ... + 189021.

It is an arithmetic number, because the mean of its divisors is an integer number (8374611).

Almost surely, 2^45713921 is an apocalyptic number.

It is an amenable number.

45713921 is a deficient number, since it is larger than the sum of its proper divisors (4533745).

45713921 is a wasteful number, since it uses less digits than its factorization.

45713921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377823 (or 377812 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 45713921 is about 6761.2070667892. The cubic root of 45713921 is about 357.5604631462.

The spelling of 45713921 in words is "forty-five million, seven hundred thirteen thousand, nine hundred twenty-one".