45477791 has 4 divisors (see below), whose sum is σ = 46156632. Its totient is φ = 44798952.

The previous prime is 45477787. The next prime is 45477799. The reversal of 45477791 is 19777454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19777454 = 2 ⋅9888727.

It is a cyclic number.

It is not a de Polignac number, because 45477791 - 2² = 45477787 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 (45477799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339320 + ... + 339453.

It is an arithmetic number, because the mean of its divisors is an integer number (11539158).

Almost surely, 2^45477791 is an apocalyptic number.

45477791 is a deficient number, since it is larger than the sum of its proper divisors (678841).

45477791 is an equidigital number, since it uses as much as digits as its factorization.

45477791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678840.

The product of its digits is 246960, while the sum is 44.

The square root of 45477791 is about 6743.7223400730. The cubic root of 45477791 is about 356.9437542651.

The spelling of 45477791 in words is "forty-five million, four hundred seventy-seven thousand, seven hundred ninety-one".