99406331 has 2 divisors, whose sum is σ = 99406332. Its totient is φ = 99406330.

The previous prime is 99406313. The next prime is 99406339. The reversal of 99406331 is 13360499.

Together with previous prime (99406313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99406331 - 2¹⁴ = 99389947 is a prime.

It is a super-2 number, since 2×99406331² = 19763237285763122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99406291 and 99406300.

It is not a weakly prime, because it can be changed into another prime (99406339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49703165 + 49703166.

It is an arithmetic number, because the mean of its divisors is an integer number (49703166).

Almost surely, 2^99406331 is an apocalyptic number.

99406331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99406331 is an equidigital number, since it uses as much as digits as its factorization.

99406331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 99406331 is about 9970.2723633811. The cubic root of 99406331 is about 463.2385372144.

The spelling of 99406331 in words is "ninety-nine million, four hundred six thousand, three hundred thirty-one".