45991839 has 4 divisors (see below), whose sum is σ = 61322456. Its totient is φ = 30661224.

The previous prime is 45991831. The next prime is 45991843. The reversal of 45991839 is 93819954.

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

It is not a de Polignac number, because 45991839 - 2³ = 45991831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45991831) 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, 7665304 + ... + 7665309.

It is an arithmetic number, because the mean of its divisors is an integer number (15330614).

Almost surely, 2^45991839 is an apocalyptic number.

45991839 is a deficient number, since it is larger than the sum of its proper divisors (15330617).

45991839 is a wasteful number, since it uses less digits than its factorization.

45991839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330616.

The product of its digits is 349920, while the sum is 48.

The square root of 45991839 is about 6781.7283195363. The cubic root of 45991839 is about 358.2835965341.

The spelling of 45991839 in words is "forty-five million, nine hundred ninety-one thousand, eight hundred thirty-nine".