87098173 has 2 divisors, whose sum is σ = 87098174. Its totient is φ = 87098172.

The previous prime is 87098153. The next prime is 87098201. The reversal of 87098173 is 37189078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83868964 + 3229209 = 9158^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 87098173 - 2²⁵ = 53543741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87098153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43549086 + 43549087.

It is an arithmetic number, because the mean of its divisors is an integer number (43549087).

Almost surely, 2^87098173 is an apocalyptic number.

It is an amenable number.

87098173 is a deficient number, since it is larger than the sum of its proper divisors (1).

87098173 is an equidigital number, since it uses as much as digits as its factorization.

87098173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 87098173 is about 9332.6401945002. The cubic root of 87098173 is about 443.2713697232.

The spelling of 87098173 in words is "eighty-seven million, ninety-eight thousand, one hundred seventy-three".