99976897 has 2 divisors, whose sum is σ = 99976898. Its totient is φ = 99976896.

The previous prime is 99976861. The next prime is 99976939. The reversal of 99976897 is 79867999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99820081 + 156816 = 9991^2 + 396^2 .

It is an emirp because it is prime and its reverse (79867999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99976897 - 2¹⁵ = 99944129 is a prime.

It is not a weakly prime, because it can be changed into another prime (99976817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988448 + 49988449.

It is an arithmetic number, because the mean of its divisors is an integer number (49988449).

Almost surely, 2^99976897 is an apocalyptic number.

It is an amenable number.

99976897 is a deficient number, since it is larger than the sum of its proper divisors (1).

99976897 is an equidigital number, since it uses as much as digits as its factorization.

99976897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15431472, while the sum is 64.

The square root of 99976897 is about 9998.8447832737. The cubic root of 99976897 is about 464.1231357326.

The spelling of 99976897 in words is "ninety-nine million, nine hundred seventy-six thousand, eight hundred ninety-seven".