45991899 has 6 divisors (see below), whose sum is σ = 66432756. Its totient is φ = 30661260.

The previous prime is 45991889. The next prime is 45991921. The reversal of 45991899 is 99819954.

45991899 is a `hidden beast` number, since 459 + 9 + 189 + 9 = 666.

It is not a de Polignac number, because 45991899 - 2⁸ = 45991643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45991889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2555097 + ... + 2555114.

It is an arithmetic number, because the mean of its divisors is an integer number (11072126).

Almost surely, 2^45991899 is an apocalyptic number.

45991899 is a deficient number, since it is larger than the sum of its proper divisors (20440857).

45991899 is a wasteful number, since it uses less digits than its factorization.

45991899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110217 (or 5110214 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 45991899 is about 6781.7327431859. The cubic root of 45991899 is about 358.2837523372.

The spelling of 45991899 in words is "forty-five million, nine hundred ninety-one thousand, eight hundred ninety-nine".