99402731 has 4 divisors (see below), whose sum is σ = 99639264.
Its totient is φ = 99166200.
The previous prime is 99402727. The next prime is 99402761. The reversal of 99402731 is 13720499.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13720499 = 13 ⋅1055423.
It is a cyclic number.
It is not a de Polignac number, because 99402731 - 22 = 99402727 is a prime.
It is a super-2 number, since 2×994027312 = 19761805860516722, which contains 22 as substring.
It is a house number.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 99402691 and 99402700.
It is not an unprimeable number, because it can be changed into a prime (99402701) 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, 117635 + ... + 118476.
It is an arithmetic number, because the mean of its divisors is an integer number (24909816).
Almost surely, 299402731 is an apocalyptic number.
99402731 is a deficient number, since it is larger than the sum of its proper divisors (236533).
99402731 is a wasteful number, since it uses less digits than its factorization.
99402731 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 236532.
The product of its (nonzero) digits is 13608, while the sum is 35.
The square root of 99402731 is about 9970.0918250536.
The cubic root of 99402731 is about 463.2329450861.
The spelling of 99402731 in words is "ninety-nine million, four hundred two thousand, seven hundred thirty-one".