45009391 has 12 divisors (see below), whose sum is σ = 53079312. Its totient is φ = 38047968.

The previous prime is 45009379. The next prime is 45009403. The reversal of 45009391 is 19390054.

It is an interprime number because it is at equal distance from previous prime (45009379) and next prime (45009403).

It is not a de Polignac number, because 45009391 - 2²¹ = 42912239 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 (45009311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2715 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (4423276).

Almost surely, 2^45009391 is an apocalyptic number.

45009391 is a deficient number, since it is larger than the sum of its proper divisors (8069921).

45009391 is a wasteful number, since it uses less digits than its factorization.

45009391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12670 (or 12663 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 45009391 is about 6708.9038597971. The cubic root of 45009391 is about 355.7140715317.

The spelling of 45009391 in words is "forty-five million, nine thousand, three hundred ninety-one".