99668497 has 4 divisors (see below), whose sum is σ = 100085760. Its totient is φ = 99251236.

The previous prime is 99668483. The next prime is 99668507. The reversal of 99668497 is 79486699.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79486699 = 709 ⋅112111.

It is a cyclic number.

It is not a de Polignac number, because 99668497 - 2⁷ = 99668369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99668477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208273 + ... + 208750.

It is an arithmetic number, because the mean of its divisors is an integer number (25021440).

Almost surely, 2^99668497 is an apocalyptic number.

It is an amenable number.

99668497 is a deficient number, since it is larger than the sum of its proper divisors (417263).

99668497 is a wasteful number, since it uses less digits than its factorization.

99668497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417262.

The product of its digits is 5878656, while the sum is 58.

The square root of 99668497 is about 9983.4110904039. The cubic root of 99668497 is about 463.6454153476.

The spelling of 99668497 in words is "ninety-nine million, six hundred sixty-eight thousand, four hundred ninety-seven".