172017793 has 2 divisors, whose sum is σ = 172017794. Its totient is φ = 172017792.

The previous prime is 172017787. The next prime is 172017799. The reversal of 172017793 is 397710271.

It is a balanced prime because it is at equal distance from previous prime (172017787) and next prime (172017799).

It can be written as a sum of positive squares in only one way, i.e., 145154304 + 26863489 = 12048^2 + 5183^2 .

It is a cyclic number.

It is not a de Polignac number, because 172017793 - 2⁹ = 172017281 is a prime.

It is a super-2 number, since 2×172017793² = 59180242217181698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172017799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86008896 + 86008897.

It is an arithmetic number, because the mean of its divisors is an integer number (86008897).

Almost surely, 2^172017793 is an apocalyptic number.

It is an amenable number.

172017793 is a deficient number, since it is larger than the sum of its proper divisors (1).

172017793 is an equidigital number, since it uses as much as digits as its factorization.

172017793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522, while the sum is 37.

The square root of 172017793 is about 13115.5553828269. Note that the first 3 decimals coincide. The cubic root of 172017793 is about 556.1489527683.

The spelling of 172017793 in words is "one hundred seventy-two million, seventeen thousand, seven hundred ninety-three".