99999423397 has 2 divisors, whose sum is σ = 99999423398. Its totient is φ = 99999423396.

The previous prime is 99999423389. The next prime is 99999423421. The reversal of 99999423397 is 79332499999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99266584356 + 732839041 = 315066^2 + 27071^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999423397 - 2³ = 99999423389 is a prime.

It is a congruent number.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999711698 + 49999711699.

It is an arithmetic number, because the mean of its divisors is an integer number (49999711699).

Almost surely, 2^99999423397 is an apocalyptic number.

It is an amenable number.

99999423397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999423397 is an equidigital number, since it uses as much as digits as its factorization.

99999423397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 267846264, while the sum is 73.

The spelling of 99999423397 in words is "ninety-nine billion, nine hundred ninety-nine million, four hundred twenty-three thousand, three hundred ninety-seven".