99853979 has 2 divisors, whose sum is σ = 99853980. Its totient is φ = 99853978.

The previous prime is 99853951. The next prime is 99853997. The reversal of 99853979 is 97935899.

Together with next prime (99853997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99853979 - 2⁸ = 99853723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99853909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49926989 + 49926990.

It is an arithmetic number, because the mean of its divisors is an integer number (49926990).

Almost surely, 2^99853979 is an apocalyptic number.

99853979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99853979 is an equidigital number, since it uses as much as digits as its factorization.

99853979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 59.

The square root of 99853979 is about 9992.6962827857. The cubic root of 99853979 is about 463.9328501592.

The spelling of 99853979 in words is "ninety-nine million, eight hundred fifty-three thousand, nine hundred seventy-nine".