87987973 has 8 divisors (see below), whose sum is σ = 89157600. Its totient is φ = 86826288.

The previous prime is 87987953. The next prime is 87987979. The reversal of 87987973 is 37978978.

It is a happy number.

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 87987973 - 2⁵ = 87987941 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 (87987979) 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, 22218 + ... + 25876.

It is an arithmetic number, because the mean of its divisors is an integer number (11144700).

Almost surely, 2^87987973 is an apocalyptic number.

It is an amenable number.

87987973 is a deficient number, since it is larger than the sum of its proper divisors (1169627).

87987973 is a wasteful number, since it uses less digits than its factorization.

87987973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971.

The product of its digits is 5334336, while the sum is 58.

The square root of 87987973 is about 9380.1904564886. The cubic root of 87987973 is about 444.7757536993.

The spelling of 87987973 in words is "eighty-seven million, nine hundred eighty-seven thousand, nine hundred seventy-three".