172393829 has 2 divisors, whose sum is σ = 172393830. Its totient is φ = 172393828.

The previous prime is 172393757. The next prime is 172393847. The reversal of 172393829 is 928393271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158180929 + 14212900 = 12577^2 + 3770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172393829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172393829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172393849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86196914 + 86196915.

It is an arithmetic number, because the mean of its divisors is an integer number (86196915).

Almost surely, 2^172393829 is an apocalyptic number.

It is an amenable number.

172393829 is a deficient number, since it is larger than the sum of its proper divisors (1).

172393829 is an equidigital number, since it uses as much as digits as its factorization.

172393829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 172393829 is about 13129.8830535538. The cubic root of 172393829 is about 556.5539105329.

The spelling of 172393829 in words is "one hundred seventy-two million, three hundred ninety-three thousand, eight hundred twenty-nine".