45136909 has 4 divisors (see below), whose sum is σ = 45351040. Its totient is φ = 44922780.

The previous prime is 45136877. The next prime is 45136919. The reversal of 45136909 is 90963154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90963154 = 2 ⋅45481577.

It is a cyclic number.

It is not a de Polignac number, because 45136909 - 2⁵ = 45136877 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 (45136919) 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, 106749 + ... + 107170.

It is an arithmetic number, because the mean of its divisors is an integer number (11337760).

Almost surely, 2^45136909 is an apocalyptic number.

It is an amenable number.

45136909 is a deficient number, since it is larger than the sum of its proper divisors (214131).

45136909 is a wasteful number, since it uses less digits than its factorization.

45136909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214130.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 45136909 is about 6718.4007769707. The cubic root of 45136909 is about 356.0496842873.

The spelling of 45136909 in words is "forty-five million, one hundred thirty-six thousand, nine hundred nine".