87198399 has 6 divisors (see below), whose sum is σ = 125953256. Its totient is φ = 58132260.

The previous prime is 87198361. The next prime is 87198403. The reversal of 87198399 is 99389178.

It is not a de Polignac number, because 87198399 - 2⁸ = 87198143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87098399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4844347 + ... + 4844364.

Almost surely, 2^87198399 is an apocalyptic number.

87198399 is a deficient number, since it is larger than the sum of its proper divisors (38754857).

87198399 is a wasteful number, since it uses less digits than its factorization.

87198399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688717 (or 9688714 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 87198399 is about 9338.0082994180. The cubic root of 87198399 is about 443.4413322856.

The spelling of 87198399 in words is "eighty-seven million, one hundred ninety-eight thousand, three hundred ninety-nine".