172006669 has 2 divisors, whose sum is σ = 172006670. Its totient is φ = 172006668.

The previous prime is 172006633. The next prime is 172006691. The reversal of 172006669 is 966600271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104142025 + 67864644 = 10205^2 + 8238^2 .

It is a cyclic number.

It is not a de Polignac number, because 172006669 - 2⁹ = 172006157 is a prime.

It is a super-2 number, since 2×172006669² = 59172588360951122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172006619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86003334 + 86003335.

It is an arithmetic number, because the mean of its divisors is an integer number (86003335).

Almost surely, 2^172006669 is an apocalyptic number.

It is an amenable number.

172006669 is a deficient number, since it is larger than the sum of its proper divisors (1).

172006669 is an equidigital number, since it uses as much as digits as its factorization.

172006669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 172006669 is about 13115.1312993809. The cubic root of 172006669 is about 556.1369642133.

The spelling of 172006669 in words is "one hundred seventy-two million, six thousand, six hundred sixty-nine".