98721131 has 4 divisors (see below), whose sum is σ = 103917000. Its totient is φ = 93525264.

The previous prime is 98721121. The next prime is 98721151. The reversal of 98721131 is 13112789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13112789 = 1187 ⋅11047.

It is a cyclic number.

It is not a de Polignac number, because 98721131 - 2⁶ = 98721067 is a prime.

It is a super-2 number, since 2×98721131² = 19491723411838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98721121) 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, 2597906 + ... + 2597943.

It is an arithmetic number, because the mean of its divisors is an integer number (25979250).

Almost surely, 2^98721131 is an apocalyptic number.

98721131 is a deficient number, since it is larger than the sum of its proper divisors (5195869).

98721131 is a wasteful number, since it uses less digits than its factorization.

98721131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195868.

The product of its digits is 3024, while the sum is 32.

The square root of 98721131 is about 9935.8507939683. The cubic root of 98721131 is about 462.1717267319.

The spelling of 98721131 in words is "ninety-eight million, seven hundred twenty-one thousand, one hundred thirty-one".