87917487 has 8 divisors (see below), whose sum is σ = 133969536. Its totient is φ = 50238552.

The previous prime is 87917471. The next prime is 87917507. The reversal of 87917487 is 78471978.

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

It is not a de Polignac number, because 87917487 - 2⁴ = 87917471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87917447) 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, 2093253 + ... + 2093294.

It is an arithmetic number, because the mean of its divisors is an integer number (16746192).

Almost surely, 2^87917487 is an apocalyptic number.

87917487 is a deficient number, since it is larger than the sum of its proper divisors (46052049).

87917487 is a wasteful number, since it uses less digits than its factorization.

87917487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4186557.

The product of its digits is 790272, while the sum is 51.

The square root of 87917487 is about 9376.4325305523. The cubic root of 87917487 is about 444.6569539819.

The spelling of 87917487 in words is "eighty-seven million, nine hundred seventeen thousand, four hundred eighty-seven".