99259856693 has 2 divisors, whose sum is σ = 99259856694. Its totient is φ = 99259856692.

The previous prime is 99259856617. The next prime is 99259856701. The reversal of 99259856693 is 39665895299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85227795844 + 14032060849 = 291938^2 + 118457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99259856693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99259856093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49629928346 + 49629928347.

It is an arithmetic number, because the mean of its divisors is an integer number (49629928347).

Almost surely, 2^99259856693 is an apocalyptic number.

It is an amenable number.

99259856693 is a deficient number, since it is larger than the sum of its proper divisors (1).

99259856693 is an equidigital number, since it uses as much as digits as its factorization.

99259856693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 283435200, while the sum is 71.

The spelling of 99259856693 in words is "ninety-nine billion, two hundred fifty-nine million, eight hundred fifty-six thousand, six hundred ninety-three".