99172597 has 2 divisors, whose sum is σ = 99172598. Its totient is φ = 99172596.

The previous prime is 99172561. The next prime is 99172621. The reversal of 99172597 is 79527199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73376356 + 25796241 = 8566^2 + 5079^2 .

It is an emirp because it is prime and its reverse (79527199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99172597 - 2¹⁹ = 98648309 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99172597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99172537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49586298 + 49586299.

It is an arithmetic number, because the mean of its divisors is an integer number (49586299).

Almost surely, 2^99172597 is an apocalyptic number.

It is an amenable number.

99172597 is a deficient number, since it is larger than the sum of its proper divisors (1).

99172597 is an equidigital number, since it uses as much as digits as its factorization.

99172597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 357210, while the sum is 49.

The square root of 99172597 is about 9958.5439196702. The cubic root of 99172597 is about 462.8751815200.

The spelling of 99172597 in words is "ninety-nine million, one hundred seventy-two thousand, five hundred ninety-seven".