99168551 has 2 divisors, whose sum is σ = 99168552. Its totient is φ = 99168550.

The previous prime is 99168533. The next prime is 99168583. The reversal of 99168551 is 15586199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99168551 - 2¹⁰ = 99167527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99168521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49584275 + 49584276.

It is an arithmetic number, because the mean of its divisors is an integer number (49584276).

Almost surely, 2^99168551 is an apocalyptic number.

99168551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99168551 is an equidigital number, since it uses as much as digits as its factorization.

99168551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 44.

The square root of 99168551 is about 9958.3407754505. The cubic root of 99168551 is about 462.8688867084.

The spelling of 99168551 in words is "ninety-nine million, one hundred sixty-eight thousand, five hundred fifty-one".