99913663697 has 2 divisors, whose sum is σ = 99913663698. Its totient is φ = 99913663696.

The previous prime is 99913663691. The next prime is 99913663711. The reversal of 99913663697 is 79636631999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96771388561 + 3142275136 = 311081^2 + 56056^2 .

It is a cyclic number.

It is not a de Polignac number, because 99913663697 - 2¹⁴ = 99913647313 is a prime.

It is not a weakly prime, because it can be changed into another prime (99913663691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49956831848 + 49956831849.

It is an arithmetic number, because the mean of its divisors is an integer number (49956831849).

Almost surely, 2^99913663697 is an apocalyptic number.

It is an amenable number.

99913663697 is a deficient number, since it is larger than the sum of its proper divisors (1).

99913663697 is an equidigital number, since it uses as much as digits as its factorization.

99913663697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89282088, while the sum is 68.

The spelling of 99913663697 in words is "ninety-nine billion, nine hundred thirteen million, six hundred sixty-three thousand, six hundred ninety-seven".