98687791131 has 4 divisors (see below), whose sum is σ = 131583721512. Its totient is φ = 65791860752.

The previous prime is 98687791129. The next prime is 98687791133. The reversal of 98687791131 is 13119778689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13119778689 = 3 ⋅4373259563.

It is an interprime number because it is at equal distance from previous prime (98687791129) and next prime (98687791133).

It is a cyclic number.

It is not a de Polignac number, because 98687791131 - 2¹ = 98687791129 is a prime.

It is a super-2 number, since 2×98687791131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (98687791133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16447965186 + ... + 16447965191.

It is an arithmetic number, because the mean of its divisors is an integer number (32895930378).

Almost surely, 2^98687791131 is an apocalyptic number.

98687791131 is a deficient number, since it is larger than the sum of its proper divisors (32895930381).

98687791131 is a wasteful number, since it uses less digits than its factorization.

98687791131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32895930380.

The product of its digits is 4572288, while the sum is 60.

The spelling of 98687791131 in words is "ninety-eight billion, six hundred eighty-seven million, seven hundred ninety-one thousand, one hundred thirty-one".