87998859 has 16 divisors (see below), whose sum is σ = 140397600. Its totient is φ = 54152928.

The previous prime is 87998837. The next prime is 87998887. The reversal of 87998859 is 95889978.

It is not a de Polignac number, because 87998859 - 2¹³ = 87990667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87998796 and 87998805.

It is not an unprimeable number, because it can be changed into a prime (87998819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125004 + ... + 125705.

It is an arithmetic number, because the mean of its divisors is an integer number (8774850).

Almost surely, 2^87998859 is an apocalyptic number.

87998859 is a deficient number, since it is larger than the sum of its proper divisors (52398741).

87998859 is a wasteful number, since it uses less digits than its factorization.

87998859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250731 (or 250725 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The square root of 87998859 is about 9380.7707039454. The cubic root of 87998859 is about 444.7940957106.

The spelling of 87998859 in words is "eighty-seven million, nine hundred ninety-eight thousand, eight hundred fifty-nine".