99430031 has 2 divisors, whose sum is σ = 99430032. Its totient is φ = 99430030.

The previous prime is 99430013. The next prime is 99430049. The reversal of 99430031 is 13003499.

Together with previous prime (99430013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (99430013) and next prime (99430049).

It is an emirp because it is prime and its reverse (13003499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99430031 is a prime.

It is a super-2 number, since 2×99430031² = 19772662129321922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99429976 and 99430003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99430091) 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, 49715015 + 49715016.

It is an arithmetic number, because the mean of its divisors is an integer number (49715016).

Almost surely, 2^99430031 is an apocalyptic number.

99430031 is a deficient number, since it is larger than the sum of its proper divisors (1).

99430031 is an equidigital number, since it uses as much as digits as its factorization.

99430031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 99430031 is about 9971.4608257767. The cubic root of 99430031 is about 463.2753486892.

The spelling of 99430031 in words is "ninety-nine million, four hundred thirty thousand, thirty-one".