45637989 has 4 divisors (see below), whose sum is σ = 60850656. Its totient is φ = 30425324.

The previous prime is 45637951. The next prime is 45637993. The reversal of 45637989 is 98973654.

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 not a de Polignac number, because 45637989 - 2⁷ = 45637861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45637939) 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, 7606329 + ... + 7606334.

It is an arithmetic number, because the mean of its divisors is an integer number (15212664).

Almost surely, 2^45637989 is an apocalyptic number.

It is an amenable number.

45637989 is a deficient number, since it is larger than the sum of its proper divisors (15212667).

45637989 is a wasteful number, since it uses less digits than its factorization.

45637989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15212666.

The product of its digits is 1632960, while the sum is 51.

The square root of 45637989 is about 6755.5894635479. The cubic root of 45637989 is about 357.3623810535.

The spelling of 45637989 in words is "forty-five million, six hundred thirty-seven thousand, nine hundred eighty-nine".