99251879 has 2 divisors, whose sum is σ = 99251880. Its totient is φ = 99251878.

The previous prime is 99251861. The next prime is 99251927. The reversal of 99251879 is 97815299.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99251879 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99151879) 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, 49625939 + 49625940.

It is an arithmetic number, because the mean of its divisors is an integer number (49625940).

Almost surely, 2^99251879 is an apocalyptic number.

99251879 is a deficient number, since it is larger than the sum of its proper divisors (1).

99251879 is an equidigital number, since it uses as much as digits as its factorization.

99251879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The square root of 99251879 is about 9962.5237264460. The cubic root of 99251879 is about 462.9984948023.

The spelling of 99251879 in words is "ninety-nine million, two hundred fifty-one thousand, eight hundred seventy-nine".