45179891 has 4 divisors (see below), whose sum is σ = 47557800. Its totient is φ = 42801984.

The previous prime is 45179887. The next prime is 45179917. The reversal of 45179891 is 19897154.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45179891 - 2² = 45179887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45179801) 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, 1188926 + ... + 1188963.

It is an arithmetic number, because the mean of its divisors is an integer number (11889450).

Almost surely, 2^45179891 is an apocalyptic number.

45179891 is a deficient number, since it is larger than the sum of its proper divisors (2377909).

45179891 is a wasteful number, since it uses less digits than its factorization.

45179891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377908.

The product of its digits is 90720, while the sum is 44.

The square root of 45179891 is about 6721.5988425374. The cubic root of 45179891 is about 356.1626655313.

The spelling of 45179891 in words is "forty-five million, one hundred seventy-nine thousand, eight hundred ninety-one".