45721723 has 4 divisors (see below), whose sum is σ = 47709648. Its totient is φ = 43733800.

The previous prime is 45721691. The next prime is 45721727. The reversal of 45721723 is 32712754.

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 45721723 - 2⁵ = 45721691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45721727) 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, 993928 + ... + 993973.

It is an arithmetic number, because the mean of its divisors is an integer number (11927412).

Almost surely, 2^45721723 is an apocalyptic number.

45721723 is a deficient number, since it is larger than the sum of its proper divisors (1987925).

45721723 is a wasteful number, since it uses less digits than its factorization.

45721723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987924.

The product of its digits is 11760, while the sum is 31.

The square root of 45721723 is about 6761.7840101559. The cubic root of 45721723 is about 357.5808036171.

The spelling of 45721723 in words is "forty-five million, seven hundred twenty-one thousand, seven hundred twenty-three".