45490491 has 20 divisors (see below), whose sum is σ = 68824800. Its totient is φ = 29938896.

The previous prime is 45490477. The next prime is 45490493. The reversal of 45490491 is 19409454.

It is a happy number.

45490491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45490491 - 2⁹ = 45489979 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (45490493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2845 + ... + 9953.

It is an arithmetic number, because the mean of its divisors is an integer number (3441240).

Almost surely, 2^45490491 is an apocalyptic number.

45490491 is the 4266-th heptagonal number.

45490491 is a deficient number, since it is larger than the sum of its proper divisors (23334309).

45490491 is an equidigital number, since it uses as much as digits as its factorization.

45490491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200 (or 7191 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 45490491 is about 6744.6638908103. The cubic root of 45490491 is about 356.9769775422.

The spelling of 45490491 in words is "forty-five million, four hundred ninety thousand, four hundred ninety-one".