45613891 has 4 divisors (see below), whose sum is σ = 45628384. Its totient is φ = 45599400.

The previous prime is 45613877. The next prime is 45613901. The reversal of 45613891 is 19831654.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19831654 = 2 ⋅9915827.

It is a cyclic number.

It is not a de Polignac number, because 45613891 - 2¹¹ = 45611843 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 45613891.

It is not an unprimeable number, because it can be changed into a prime (45613811) 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, 315 + ... + 9556.

It is an arithmetic number, because the mean of its divisors is an integer number (11407096).

Almost surely, 2^45613891 is an apocalyptic number.

45613891 is a deficient number, since it is larger than the sum of its proper divisors (14493).

45613891 is an equidigital number, since it uses as much as digits as its factorization.

45613891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14492.

The product of its digits is 25920, while the sum is 37.

The square root of 45613891 is about 6753.8056679179. The cubic root of 45613891 is about 357.2994712202.

The spelling of 45613891 in words is "forty-five million, six hundred thirteen thousand, eight hundred ninety-one".