87619081 has 4 divisors (see below), whose sum is σ = 95584464. Its totient is φ = 79653700.

The previous prime is 87619061. The next prime is 87619087. The reversal of 87619081 is 18091678.

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 87619081 - 2¹³ = 87610889 is a prime.

It is a super-2 number, since 2×87619081² = 15354206710569122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87619087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3982675 + ... + 3982696.

It is an arithmetic number, because the mean of its divisors is an integer number (23896116).

Almost surely, 2^87619081 is an apocalyptic number.

It is an amenable number.

87619081 is a deficient number, since it is larger than the sum of its proper divisors (7965383).

87619081 is a wasteful number, since it uses less digits than its factorization.

87619081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965382.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 87619081 is about 9360.5064499737. The cubic root of 87619081 is about 444.1533048103.

The spelling of 87619081 in words is "eighty-seven million, six hundred nineteen thousand, eighty-one".