45881999 has 4 divisors (see below), whose sum is σ = 46659720. Its totient is φ = 45104280.

The previous prime is 45881981. The next prime is 45882007. The reversal of 45881999 is 99918854.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45881999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45881999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45881959) 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, 388772 + ... + 388889.

It is an arithmetic number, because the mean of its divisors is an integer number (11664930).

Almost surely, 2^45881999 is an apocalyptic number.

45881999 is a deficient number, since it is larger than the sum of its proper divisors (777721).

45881999 is an equidigital number, since it uses as much as digits as its factorization.

45881999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777720.

The product of its digits is 933120, while the sum is 53.

The square root of 45881999 is about 6773.6252479747. The cubic root of 45881999 is about 357.9981455955.

The spelling of 45881999 in words is "forty-five million, eight hundred eighty-one thousand, nine hundred ninety-nine".