172709983 has 2 divisors, whose sum is σ = 172709984. Its totient is φ = 172709982.

The previous prime is 172709963. The next prime is 172710017. The reversal of 172709983 is 389907271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172709983 - 2⁵ = 172709951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172709963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86354991 + 86354992.

It is an arithmetic number, because the mean of its divisors is an integer number (86354992).

Almost surely, 2^172709983 is an apocalyptic number.

172709983 is a deficient number, since it is larger than the sum of its proper divisors (1).

172709983 is an equidigital number, since it uses as much as digits as its factorization.

172709983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 172709983 is about 13141.9170215003. The cubic root of 172709983 is about 556.8939252013.

The spelling of 172709983 in words is "one hundred seventy-two million, seven hundred nine thousand, nine hundred eighty-three".