172249099 has 16 divisors (see below), whose sum is σ = 195934464. Its totient is φ = 150040800.

The previous prime is 172249069. The next prime is 172249111. The reversal of 172249099 is 990942271.

It is a cyclic number.

It is not a de Polignac number, because 172249099 - 2⁷ = 172248971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (172249069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21634 + ... + 28504.

It is an arithmetic number, because the mean of its divisors is an integer number (12245904).

Almost surely, 2^172249099 is an apocalyptic number.

172249099 is a deficient number, since it is larger than the sum of its proper divisors (23685365).

172249099 is a wasteful number, since it uses less digits than its factorization.

172249099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 172249099 is about 13124.3704229955. The cubic root of 172249099 is about 556.3981188013.

The spelling of 172249099 in words is "one hundred seventy-two million, two hundred forty-nine thousand, ninety-nine".