99634291217 has 2 divisors, whose sum is σ = 99634291218. Its totient is φ = 99634291216.

The previous prime is 99634291213. The next prime is 99634291223. The reversal of 99634291217 is 71219243699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99634291201 + 16 = 315649^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 99634291217 - 2² = 99634291213 is a prime.

It is not a weakly prime, because it can be changed into another prime (99634291213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49817145608 + 49817145609.

It is an arithmetic number, because the mean of its divisors is an integer number (49817145609).

Almost surely, 2^99634291217 is an apocalyptic number.

It is an amenable number.

99634291217 is a deficient number, since it is larger than the sum of its proper divisors (1).

99634291217 is an equidigital number, since it uses as much as digits as its factorization.

99634291217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The spelling of 99634291217 in words is "ninety-nine billion, six hundred thirty-four million, two hundred ninety-one thousand, two hundred seventeen".