99170251 has 4 divisors (see below), whose sum is σ = 100650472. Its totient is φ = 97690032.

The previous prime is 99170243. The next prime is 99170263. The reversal of 99170251 is 15207199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99170251 - 2³ = 99170243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99170221) 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 in 3 ways as a sum of consecutive naturals, for example, 740010 + ... + 740143.

It is an arithmetic number, because the mean of its divisors is an integer number (25162618).

Almost surely, 2^99170251 is an apocalyptic number.

99170251 is the 5750-th hex number.

99170251 is a deficient number, since it is larger than the sum of its proper divisors (1480221).

99170251 is a wasteful number, since it uses less digits than its factorization.

99170251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480220.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 99170251 is about 9958.4261306694. The cubic root of 99170251 is about 462.8715316081.

The spelling of 99170251 in words is "ninety-nine million, one hundred seventy thousand, two hundred fifty-one".