98687731 has 4 divisors (see below), whose sum is σ = 98737632. Its totient is φ = 98637832.

The previous prime is 98687723. The next prime is 98687801. The reversal of 98687731 is 13778689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13778689 = 37 ⋅372397.

It is a cyclic number.

It is not a de Polignac number, because 98687731 - 2³ = 98687723 is a prime.

It is a super-2 number, since 2×98687731² = 19478536499856722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98687131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21856 + ... + 25981.

It is an arithmetic number, because the mean of its divisors is an integer number (24684408).

Almost surely, 2^98687731 is an apocalyptic number.

98687731 is a deficient number, since it is larger than the sum of its proper divisors (49901).

98687731 is a wasteful number, since it uses less digits than its factorization.

98687731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49900.

The product of its digits is 508032, while the sum is 49.

The square root of 98687731 is about 9934.1698696972. The cubic root of 98687731 is about 462.1195991657.

The spelling of 98687731 in words is "ninety-eight million, six hundred eighty-seven thousand, seven hundred thirty-one".