45199999 has 16 divisors (see below), whose sum is σ = 50309280. Its totient is φ = 40343040.

The previous prime is 45199967. The next prime is 45200003. The reversal of 45199999 is 99999154.

It is a cyclic number.

It is not a de Polignac number, because 45199999 - 2⁵ = 45199967 is a prime.

It is a Duffinian number.

Its product of digits (1180980) is a multiple of the sum of its prime divisors (810).

45199999 is a modest number, since divided by 9999 gives 4519 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45199909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72712 + ... + 73330.

It is an arithmetic number, because the mean of its divisors is an integer number (3144330).

Almost surely, 2^45199999 is an apocalyptic number.

45199999 is a deficient number, since it is larger than the sum of its proper divisors (5109281).

45199999 is a wasteful number, since it uses less digits than its factorization.

45199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810.

The product of its digits is 1180980, while the sum is 55.

The square root of 45199999 is about 6723.0944512181. The cubic root of 45199999 is about 356.2154962377.

The spelling of 45199999 in words is "forty-five million, one hundred ninety-nine thousand, nine hundred ninety-nine".