99042331 has 2 divisors, whose sum is σ = 99042332. Its totient is φ = 99042330.

The previous prime is 99042313. The next prime is 99042343. The reversal of 99042331 is 13324099.

Together with previous prime (99042313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13324099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99042331 - 2⁵ = 99042299 is a prime.

It is a super-2 number, since 2×99042331² = 19618766659827122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99042293 and 99042302.

It is not a weakly prime, because it can be changed into another prime (99046331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49521165 + 49521166.

It is an arithmetic number, because the mean of its divisors is an integer number (49521166).

Almost surely, 2^99042331 is an apocalyptic number.

99042331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99042331 is an equidigital number, since it uses as much as digits as its factorization.

99042331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 99042331 is about 9952.0013565112. The cubic root of 99042331 is about 462.6724261889.

The spelling of 99042331 in words is "ninety-nine million, forty-two thousand, three hundred thirty-one".