99172259 has 2 divisors, whose sum is σ = 99172260. Its totient is φ = 99172258.

The previous prime is 99172217. The next prime is 99172273. The reversal of 99172259 is 95227199.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99172259 is a prime.

It is not a weakly prime, because it can be changed into another prime (99172289) 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, 49586129 + 49586130.

It is an arithmetic number, because the mean of its divisors is an integer number (49586130).

Almost surely, 2^99172259 is an apocalyptic number.

99172259 is a deficient number, since it is larger than the sum of its proper divisors (1).

99172259 is an equidigital number, since it uses as much as digits as its factorization.

99172259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 44.

The square root of 99172259 is about 9958.5269493033. The cubic root of 99172259 is about 462.8746556624.

The spelling of 99172259 in words is "ninety-nine million, one hundred seventy-two thousand, two hundred fifty-nine".