99976999 has 2 divisors, whose sum is σ = 99977000. Its totient is φ = 99976998.

The previous prime is 99976939. The next prime is 99977041. The reversal of 99976999 is 99967999.

It is a strong prime.

It is an emirp because it is prime and its reverse (99967999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99976999 - 2²³ = 91588391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99976939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988499 + 49988500.

It is an arithmetic number, because the mean of its divisors is an integer number (49988500).

Almost surely, 2^99976999 is an apocalyptic number.

99976999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99976999 is an equidigital number, since it uses as much as digits as its factorization.

99976999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22320522, while the sum is 67.

The square root of 99976999 is about 9998.8498838616. The cubic root of 99976999 is about 464.1232935709.

The spelling of 99976999 in words is "ninety-nine million, nine hundred seventy-six thousand, nine hundred ninety-nine".