99951811 has 2 divisors, whose sum is σ = 99951812. Its totient is φ = 99951810.

The previous prime is 99951779. The next prime is 99951833. The reversal of 99951811 is 11815999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99951811 - 2⁵ = 99951779 is a prime.

It is not a weakly prime, because it can be changed into another prime (99951851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49975905 + 49975906.

It is an arithmetic number, because the mean of its divisors is an integer number (49975906).

Almost surely, 2^99951811 is an apocalyptic number.

99951811 is a deficient number, since it is larger than the sum of its proper divisors (1).

99951811 is an equidigital number, since it uses as much as digits as its factorization.

99951811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 43.

The square root of 99951811 is about 9997.5902596576. The cubic root of 99951811 is about 464.0843135404.

The spelling of 99951811 in words is "ninety-nine million, nine hundred fifty-one thousand, eight hundred eleven".