87989098979 has 8 divisors (see below), whose sum is σ = 89326228800. Its totient is φ = 86655531456.

The previous prime is 87989098963. The next prime is 87989099071. The reversal of 87989098979 is 97989098978.

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

It is a cyclic number.

It is not a de Polignac number, because 87989098979 - 2⁴ = 87989098963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87989098897 and 87989098906.

It is not an unprimeable number, because it can be changed into a prime (87989092979) 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, 840779 + ... + 939620.

It is an arithmetic number, because the mean of its divisors is an integer number (11165778600).

Almost surely, 2^87989098979 is an apocalyptic number.

87989098979 is a deficient number, since it is larger than the sum of its proper divisors (1337129821).

87989098979 is a wasteful number, since it uses less digits than its factorization.

87989098979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781149.

The product of its (nonzero) digits is 1481421312, while the sum is 83.

Subtracting 87989098979 from its reverse (97989098978), we obtain a palindrome (9999999999).

The spelling of 87989098979 in words is "eighty-seven billion, nine hundred eighty-nine million, ninety-eight thousand, nine hundred seventy-nine".