87189079 has 8 divisors (see below), whose sum is σ = 90731520. Its totient is φ = 83715576.

The previous prime is 87189023. The next prime is 87189097. The reversal of 87189079 is 97098178.

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 87189079 - 2¹⁷ = 87058007 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 (87189779) 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, 14647 + ... + 19720.

It is an arithmetic number, because the mean of its divisors is an integer number (11341440).

Almost surely, 2^87189079 is an apocalyptic number.

87189079 is a deficient number, since it is larger than the sum of its proper divisors (3542441).

87189079 is a wasteful number, since it uses less digits than its factorization.

87189079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34469.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 87189079 is about 9337.5092503301. The cubic root of 87189079 is about 443.4255329876.

Subtracting 87189079 from its reverse (97098178), we obtain a palindrome (9909099).

The spelling of 87189079 in words is "eighty-seven million, one hundred eighty-nine thousand, seventy-nine".