87955979 has 4 divisors (see below), whose sum is σ = 91780176. Its totient is φ = 84131784.

The previous prime is 87955939. The next prime is 87955981. The reversal of 87955979 is 97955978.

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 87955979 - 2¹² = 87951883 is a prime.

It is a super-3 number, since 3×87955979³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87955939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912064 + ... + 1912109.

It is an arithmetic number, because the mean of its divisors is an integer number (22945044).

Almost surely, 2^87955979 is an apocalyptic number.

87955979 is a deficient number, since it is larger than the sum of its proper divisors (3824197).

87955979 is a wasteful number, since it uses less digits than its factorization.

87955979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824196.

The product of its digits is 7144200, while the sum is 59.

The square root of 87955979 is about 9378.4848989589. The cubic root of 87955979 is about 444.7218376920.

Subtracting 87955979 from its reverse (97955978), we obtain a palindrome (9999999).

The spelling of 87955979 in words is "eighty-seven million, nine hundred fifty-five thousand, nine hundred seventy-nine".