172016969 has 2 divisors, whose sum is σ = 172016970. Its totient is φ = 172016968.

The previous prime is 172016963. The next prime is 172016983. The reversal of 172016969 is 969610271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125708944 + 46308025 = 11212^2 + 6805^2 .

It is a cyclic number.

It is not a de Polignac number, because 172016969 - 2⁴ = 172016953 is a prime.

It is a super-2 number, since 2×172016969² = 59179675247893922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172016963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86008484 + 86008485.

It is an arithmetic number, because the mean of its divisors is an integer number (86008485).

Almost surely, 2^172016969 is an apocalyptic number.

It is an amenable number.

172016969 is a deficient number, since it is larger than the sum of its proper divisors (1).

172016969 is an equidigital number, since it uses as much as digits as its factorization.

172016969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 172016969 is about 13115.5239697086. The cubic root of 172016969 is about 556.1480647449.

The spelling of 172016969 in words is "one hundred seventy-two million, sixteen thousand, nine hundred sixty-nine".