87619889 has 12 divisors (see below), whose sum is σ = 102115044. Its totient is φ = 74962944.

The previous prime is 87619879. The next prime is 87619907. The reversal of 87619889 is 98891678.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42837025 + 44782864 = 6545^2 + 6692^2 .

It is not a de Polignac number, because 87619889 - 2⁸ = 87619633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87619859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31649 + ... + 34305.

It is an arithmetic number, because the mean of its divisors is an integer number (8509587).

Almost surely, 2^87619889 is an apocalyptic number.

It is an amenable number.

87619889 is a deficient number, since it is larger than the sum of its proper divisors (14495155).

87619889 is a wasteful number, since it uses less digits than its factorization.

87619889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344 (or 3337 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 56.

The square root of 87619889 is about 9360.5496099321. The cubic root of 87619889 is about 444.1546700942.

The spelling of 87619889 in words is "eighty-seven million, six hundred nineteen thousand, eight hundred eighty-nine".