87619179247 has 4 divisors (see below), whose sum is σ = 90445604416. Its totient is φ = 84792754080.

The previous prime is 87619179227. The next prime is 87619179253. The reversal of 87619179247 is 74297191678.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87619179247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87619179227) 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, 1413212538 + ... + 1413212599.

It is an arithmetic number, because the mean of its divisors is an integer number (22611401104).

Almost surely, 2^87619179247 is an apocalyptic number.

87619179247 is a deficient number, since it is larger than the sum of its proper divisors (2826425169).

87619179247 is a wasteful number, since it uses less digits than its factorization.

87619179247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826425168.

The product of its digits is 10668672, while the sum is 61.

The spelling of 87619179247 in words is "eighty-seven billion, six hundred nineteen million, one hundred seventy-nine thousand, two hundred forty-seven".