45991199 has 4 divisors (see below), whose sum is σ = 46162440. Its totient is φ = 45819960.

The previous prime is 45991177. The next prime is 45991207. The reversal of 45991199 is 99119954.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99119954 = 2 ⋅49559977.

It is a cyclic number.

It is not a de Polignac number, because 45991199 - 2⁸ = 45990943 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 (45991159) 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, 85217 + ... + 85754.

It is an arithmetic number, because the mean of its divisors is an integer number (11540610).

Almost surely, 2^45991199 is an apocalyptic number.

45991199 is a deficient number, since it is larger than the sum of its proper divisors (171241).

45991199 is a wasteful number, since it uses less digits than its factorization.

45991199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171240.

The product of its digits is 131220, while the sum is 47.

The square root of 45991199 is about 6781.6811337603. The cubic root of 45991199 is about 358.2819346265.

The spelling of 45991199 in words is "forty-five million, nine hundred ninety-one thousand, one hundred ninety-nine".