45840391 has 2 divisors, whose sum is σ = 45840392. Its totient is φ = 45840390.

The previous prime is 45840349. The next prime is 45840397. The reversal of 45840391 is 19304854.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45840391 - 2¹⁵ = 45807623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45840397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22920195 + 22920196.

It is an arithmetic number, because the mean of its divisors is an integer number (22920196).

Almost surely, 2^45840391 is an apocalyptic number.

45840391 is a deficient number, since it is larger than the sum of its proper divisors (1).

45840391 is an equidigital number, since it uses as much as digits as its factorization.

45840391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 45840391 is about 6770.5532270266. The cubic root of 45840391 is about 357.8898962304.

The spelling of 45840391 in words is "forty-five million, eight hundred forty thousand, three hundred ninety-one".