87975257979 has 8 divisors (see below), whose sum is σ = 134057536000. Its totient is φ = 50271575976.

The previous prime is 87975257911. The next prime is 87975257983. The reversal of 87975257979 is 97975257978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87975257979 - 2⁸ = 87975257723 is a prime.

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 87975257979.

It is not an unprimeable number, because it can be changed into a prime (87975257999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2094648979 + ... + 2094649020.

It is an arithmetic number, because the mean of its divisors is an integer number (16757192000).

Almost surely, 2^87975257979 is an apocalyptic number.

87975257979 is a deficient number, since it is larger than the sum of its proper divisors (46082278021).

87975257979 is a wasteful number, since it uses less digits than its factorization.

87975257979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189298009.

The product of its digits is 700131600, while the sum is 75.

Subtracting 87975257979 from its reverse (97975257978), we obtain a palindrome (9999999999).

The spelling of 87975257979 in words is "eighty-seven billion, nine hundred seventy-five million, two hundred fifty-seven thousand, nine hundred seventy-nine".