87986997 has 36 divisors (see below), whose sum is σ = 149101056. Its totient is φ = 49850640.

The previous prime is 87986989. The next prime is 87987007. The reversal of 87986997 is 79968978.

It is not a de Polignac number, because 87986997 - 2³ = 87986989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87986497) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55222 + ... + 56792.

It is an arithmetic number, because the mean of its divisors is an integer number (4141696).

Almost surely, 2^87986997 is an apocalyptic number.

It is an amenable number.

87986997 is a deficient number, since it is larger than the sum of its proper divisors (61114059).

87986997 is a wasteful number, since it uses less digits than its factorization.

87986997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718 (or 1708 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 63.

The square root of 87986997 is about 9380.1384318143. The cubic root of 87986997 is about 444.7741091460.

The spelling of 87986997 in words is "eighty-seven million, nine hundred eighty-six thousand, nine hundred ninety-seven".