87319047619 has 4 divisors (see below), whose sum is σ = 89176899744. Its totient is φ = 85461195496.

The previous prime is 87319047587. The next prime is 87319047643. The reversal of 87319047619 is 91674091378.

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

It is a cyclic number.

It is not a de Polignac number, because 87319047619 - 2⁵ = 87319047587 is a prime.

It is a super-2 number, since 2×87319047619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87319047619.

It is not an unprimeable number, because it can be changed into a prime (87319047649) 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, 928925992 + ... + 928926085.

It is an arithmetic number, because the mean of its divisors is an integer number (22294224936).

Almost surely, 2^87319047619 is an apocalyptic number.

87319047619 is a deficient number, since it is larger than the sum of its proper divisors (1857852125).

87319047619 is a wasteful number, since it uses less digits than its factorization.

87319047619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857852124.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 87319047619 in words is "eighty-seven billion, three hundred nineteen million, forty-seven thousand, six hundred nineteen".