99858761 has 2 divisors, whose sum is σ = 99858762. Its totient is φ = 99858760.

The previous prime is 99858727. The next prime is 99858763. The reversal of 99858761 is 16785899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 16483600 = 9131^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 99858761 - 2¹⁸ = 99596617 is a prime.

Together with 99858763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99858763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49929380 + 49929381.

It is an arithmetic number, because the mean of its divisors is an integer number (49929381).

Almost surely, 2^99858761 is an apocalyptic number.

It is an amenable number.

99858761 is a deficient number, since it is larger than the sum of its proper divisors (1).

99858761 is an equidigital number, since it uses as much as digits as its factorization.

99858761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 53.

The square root of 99858761 is about 9992.9355546806. The cubic root of 99858761 is about 463.9402559448.

The spelling of 99858761 in words is "ninety-nine million, eight hundred fifty-eight thousand, seven hundred sixty-one".