87999545 has 16 divisors (see below), whose sum is σ = 114746880. Its totient is φ = 64540800.

The previous prime is 87999521. The next prime is 87999553. The reversal of 87999545 is 54599978.

It is a de Polignac number, because none of the positive numbers 2^k-87999545 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11996 + ... + 17885.

It is an arithmetic number, because the mean of its divisors is an integer number (7171680).

Almost surely, 2^87999545 is an apocalyptic number.

It is an amenable number.

87999545 is a deficient number, since it is larger than the sum of its proper divisors (26747335).

87999545 is a wasteful number, since it uses less digits than its factorization.

87999545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29936.

The product of its digits is 4082400, while the sum is 56.

The square root of 87999545 is about 9380.8072680340. The cubic root of 87999545 is about 444.7952515133.

The spelling of 87999545 in words is "eighty-seven million, nine hundred ninety-nine thousand, five hundred forty-five".