99976321 has 2 divisors, whose sum is σ = 99976322. Its totient is φ = 99976320.

The previous prime is 99976319. The next prime is 99976361. The reversal of 99976321 is 12367999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98903025 + 1073296 = 9945^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 99976321 - 2¹ = 99976319 is a prime.

Together with 99976319, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99976301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49988160 + 49988161.

It is an arithmetic number, because the mean of its divisors is an integer number (49988161).

Almost surely, 2^99976321 is an apocalyptic number.

It is an amenable number.

99976321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99976321 is an equidigital number, since it uses as much as digits as its factorization.

99976321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 99976321 is about 9998.8159799048. The cubic root of 99976321 is about 464.1222444085.

The spelling of 99976321 in words is "ninety-nine million, nine hundred seventy-six thousand, three hundred twenty-one".