87198011 has 16 divisors (see below), whose sum is σ = 95650560. Its totient is φ = 79198560.

The previous prime is 87197969. The next prime is 87198029. The reversal of 87198011 is 11089178.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87198011 is a prime.

It is a super-2 number, since 2×87198011² = 15206986244712242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87198211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49040 + ... + 50786.

It is an arithmetic number, because the mean of its divisors is an integer number (5978160).

Almost surely, 2^87198011 is an apocalyptic number.

87198011 is a deficient number, since it is larger than the sum of its proper divisors (8452549).

87198011 is a wasteful number, since it uses less digits than its factorization.

87198011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 87198011 is about 9337.9875240868. The cubic root of 87198011 is about 443.4406745690.

The spelling of 87198011 in words is "eighty-seven million, one hundred ninety-eight thousand, eleven".