87698091 has 24 divisors (see below), whose sum is σ = 132923280. Its totient is φ = 51119424.

The previous prime is 87698071. The next prime is 87698111. The reversal of 87698091 is 19089678.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87698071) and next prime (87698111).

It is not a de Polignac number, because 87698091 - 2⁹ = 87697579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87698091.

It is not an unprimeable number, because it can be changed into a prime (87698071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10965 + ... + 17193.

It is an arithmetic number, because the mean of its divisors is an integer number (5538470).

Almost surely, 2^87698091 is an apocalyptic number.

87698091 is a deficient number, since it is larger than the sum of its proper divisors (45225189).

87698091 is a wasteful number, since it uses less digits than its factorization.

87698091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283 (or 6264 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 87698091 is about 9364.7258902757. The cubic root of 87698091 is about 444.2867689269.

The spelling of 87698091 in words is "eighty-seven million, six hundred ninety-eight thousand, ninety-one".