99689454494213 has 2 divisors, whose sum is σ = 99689454494214. Its totient is φ = 99689454494212.

The previous prime is 99689454494171. The next prime is 99689454494221. The reversal of 99689454494213 is 31249445498699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79163317480129 + 20526137014084 = 8897377^2 + 4530578^2 .

It is a cyclic number.

It is not a de Polignac number, because 99689454494213 - 2¹⁴ = 99689454477829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99659454494213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49844727247106 + 49844727247107.

It is an arithmetic number, because the mean of its divisors is an integer number (49844727247107).

Almost surely, 2^{99689454494213} is an apocalyptic number.

It is an amenable number.

99689454494213 is a deficient number, since it is larger than the sum of its proper divisors (1).

99689454494213 is an equidigital number, since it uses as much as digits as its factorization.

99689454494213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2418647040, while the sum is 77.

The spelling of 99689454494213 in words is "ninety-nine trillion, six hundred eighty-nine billion, four hundred fifty-four million, four hundred ninety-four thousand, two hundred thirteen".