45158923 has 4 divisors (see below), whose sum is σ = 45224968. Its totient is φ = 45092880.

The previous prime is 45158921. The next prime is 45158947. The reversal of 45158923 is 32985154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32985154 = 2 ⋅16492577.

It is a cyclic number.

It is not a de Polignac number, because 45158923 - 2¹ = 45158921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45158921) 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, 31986 + ... + 33367.

It is an arithmetic number, because the mean of its divisors is an integer number (11306242).

Almost surely, 2^45158923 is an apocalyptic number.

45158923 is a deficient number, since it is larger than the sum of its proper divisors (66045).

45158923 is an equidigital number, since it uses as much as digits as its factorization.

45158923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66044.

The product of its digits is 43200, while the sum is 37.

The square root of 45158923 is about 6720.0389135778. The cubic root of 45158923 is about 356.1075586080.

The spelling of 45158923 in words is "forty-five million, one hundred fifty-eight thousand, nine hundred twenty-three".