45645987 has 4 divisors (see below), whose sum is σ = 60861320. Its totient is φ = 30430656.

The previous prime is 45645983. The next prime is 45645989. The reversal of 45645987 is 78954654.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 45645987 - 2² = 45645983 is a prime.

It is a super-2 number, since 2×45645987² = 4167112258408338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45645983) 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, 7607662 + ... + 7607667.

It is an arithmetic number, because the mean of its divisors is an integer number (15215330).

Almost surely, 2^45645987 is an apocalyptic number.

45645987 is a deficient number, since it is larger than the sum of its proper divisors (15215333).

45645987 is a wasteful number, since it uses less digits than its factorization.

45645987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215332.

The product of its digits is 1209600, while the sum is 48.

The square root of 45645987 is about 6756.1813918811. The cubic root of 45645987 is about 357.3832556030.

The spelling of 45645987 in words is "forty-five million, six hundred forty-five thousand, nine hundred eighty-seven".