45091917 has 16 divisors (see below), whose sum is σ = 71942080. Its totient is φ = 27748656.

The previous prime is 45091913. The next prime is 45091919. The reversal of 45091917 is 71919054.

It is not a de Polignac number, because 45091917 - 2² = 45091913 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 (45091913) 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, 63883 + ... + 64584.

It is an arithmetic number, because the mean of its divisors is an integer number (4496380).

Almost surely, 2^45091917 is an apocalyptic number.

It is an amenable number.

45091917 is a deficient number, since it is larger than the sum of its proper divisors (26850163).

45091917 is a wasteful number, since it uses less digits than its factorization.

45091917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128489 (or 128483 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 45091917 is about 6715.0515262357. The cubic root of 45091917 is about 355.9313427544.

The spelling of 45091917 in words is "forty-five million, ninety-one thousand, nine hundred seventeen".