172827929 has 2 divisors, whose sum is σ = 172827930. Its totient is φ = 172827928.

The previous prime is 172827917. The next prime is 172827937. The reversal of 172827929 is 929728271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110733529 + 62094400 = 10523^2 + 7880^2 .

It is an emirp because it is prime and its reverse (929728271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172827929 - 2⁴ = 172827913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172827959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86413964 + 86413965.

It is an arithmetic number, because the mean of its divisors is an integer number (86413965).

Almost surely, 2^172827929 is an apocalyptic number.

It is an amenable number.

172827929 is a deficient number, since it is larger than the sum of its proper divisors (1).

172827929 is an equidigital number, since it uses as much as digits as its factorization.

172827929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 172827929 is about 13146.4036527105. The cubic root of 172827929 is about 557.0206665037.

The spelling of 172827929 in words is "one hundred seventy-two million, eight hundred twenty-seven thousand, nine hundred twenty-nine".