99999431263 has 2 divisors, whose sum is σ = 99999431264. Its totient is φ = 99999431262.

The previous prime is 99999431261. The next prime is 99999431281. The reversal of 99999431263 is 36213499999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99999431263 - 2¹ = 99999431261 is a prime.

Together with 99999431261, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 99999431195 and 99999431204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999431261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999715631 + 49999715632.

It is an arithmetic number, because the mean of its divisors is an integer number (49999715632).

Almost surely, 2^99999431263 is an apocalyptic number.

99999431263 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999431263 is an equidigital number, since it uses as much as digits as its factorization.

99999431263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25509168, while the sum is 64.

The spelling of 99999431263 in words is "ninety-nine billion, nine hundred ninety-nine million, four hundred thirty-one thousand, two hundred sixty-three".