45623609 has 4 divisors (see below), whose sum is σ = 45714816. Its totient is φ = 45532404.

The previous prime is 45623581. The next prime is 45623639. The reversal of 45623609 is 90632654.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45623609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45623639) 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, 44849 + ... + 45854.

It is an arithmetic number, because the mean of its divisors is an integer number (11428704).

Almost surely, 2^45623609 is an apocalyptic number.

It is an amenable number.

45623609 is a deficient number, since it is larger than the sum of its proper divisors (91207).

45623609 is an equidigital number, since it uses as much as digits as its factorization.

45623609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91206.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 45623609 is about 6754.5250758288. The cubic root of 45623609 is about 357.3248435328.

The spelling of 45623609 in words is "forty-five million, six hundred twenty-three thousand, six hundred nine".