45591987 has 16 divisors (see below), whose sum is σ = 69585152. Its totient is φ = 26010720.

The previous prime is 45591971. The next prime is 45592009. The reversal of 45591987 is 78919554.

It is not a de Polignac number, because 45591987 - 2⁴ = 45591971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45591947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15693 + ... + 18369.

It is an arithmetic number, because the mean of its divisors is an integer number (4349072).

Almost surely, 2^45591987 is an apocalyptic number.

45591987 is a deficient number, since it is larger than the sum of its proper divisors (23993165).

45591987 is a wasteful number, since it uses less digits than its factorization.

45591987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498.

The product of its digits is 453600, while the sum is 48.

The square root of 45591987 is about 6752.1838689420. The cubic root of 45591987 is about 357.2422697806.

The spelling of 45591987 in words is "forty-five million, five hundred ninety-one thousand, nine hundred eighty-seven".