172143091 has 2 divisors, whose sum is σ = 172143092. Its totient is φ = 172143090.

The previous prime is 172143029. The next prime is 172143107. The reversal of 172143091 is 190341271.

172143091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172143091 - 2¹³ = 172134899 is a prime.

It is not a weakly prime, because it can be changed into another prime (172143011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071545 + 86071546.

It is an arithmetic number, because the mean of its divisors is an integer number (86071546).

Almost surely, 2^172143091 is an apocalyptic number.

172143091 is a deficient number, since it is larger than the sum of its proper divisors (1).

172143091 is an equidigital number, since it uses as much as digits as its factorization.

172143091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 172143091 is about 13120.3312077097. The cubic root of 172143091 is about 556.2839532193.

The spelling of 172143091 in words is "one hundred seventy-two million, one hundred forty-three thousand, ninety-one".