45898989 has 4 divisors (see below), whose sum is σ = 61198656. Its totient is φ = 30599324.

The previous prime is 45898949. The next prime is 45899011. The reversal of 45898989 is 98989854.

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 45898989 - 2⁸ = 45898733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45898939) 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, 7649829 + ... + 7649834.

It is an arithmetic number, because the mean of its divisors is an integer number (15299664).

Almost surely, 2^45898989 is an apocalyptic number.

It is an amenable number.

45898989 is a deficient number, since it is larger than the sum of its proper divisors (15299667).

45898989 is a wasteful number, since it uses less digits than its factorization.

45898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299666.

The product of its digits is 7464960, while the sum is 60.

The square root of 45898989 is about 6774.8792609168. The cubic root of 45898989 is about 358.0423287757.

The spelling of 45898989 in words is "forty-five million, eight hundred ninety-eight thousand, nine hundred eighty-nine".