172988899 has 2 divisors, whose sum is σ = 172988900. Its totient is φ = 172988898.

The previous prime is 172988887. The next prime is 172988929. The reversal of 172988899 is 998889271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172988899 - 2¹³ = 172980707 is a prime.

It is not a weakly prime, because it can be changed into another prime (172986899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86494449 + 86494450.

It is an arithmetic number, because the mean of its divisors is an integer number (86494450).

Almost surely, 2^172988899 is an apocalyptic number.

172988899 is a deficient number, since it is larger than the sum of its proper divisors (1).

172988899 is an equidigital number, since it uses as much as digits as its factorization.

172988899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 61.

The square root of 172988899 is about 13152.5244344955. The cubic root of 172988899 is about 557.1935471146.

The spelling of 172988899 in words is "one hundred seventy-two million, nine hundred eighty-eight thousand, eight hundred ninety-nine".