99630431 has 2 divisors, whose sum is σ = 99630432. Its totient is φ = 99630430.

The previous prime is 99630413. The next prime is 99630437. The reversal of 99630431 is 13403699.

Together with previous prime (99630413) 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 99630431 - 2¹⁸ = 99368287 is a prime.

It is a super-2 number, since 2×99630431² = 19852445562491522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 99630391 and 99630400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99630437) 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 as a sum of consecutive naturals, namely, 49815215 + 49815216.

It is an arithmetic number, because the mean of its divisors is an integer number (49815216).

Almost surely, 2^99630431 is an apocalyptic number.

99630431 is a deficient number, since it is larger than the sum of its proper divisors (1).

99630431 is an equidigital number, since it uses as much as digits as its factorization.

99630431 is an odious number, because the sum of its binary digits is odd.

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

The square root of 99630431 is about 9981.5044457236. The cubic root of 99630431 is about 463.5863817369.

The spelling of 99630431 in words is "ninety-nine million, six hundred thirty thousand, four hundred thirty-one".