172067257 has 2 divisors, whose sum is σ = 172067258. Its totient is φ = 172067256.

The previous prime is 172067243. The next prime is 172067263. The reversal of 172067257 is 752760271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93141801 + 78925456 = 9651^2 + 8884^2 .

It is a cyclic number.

It is not a de Polignac number, because 172067257 - 2²⁷ = 37849529 is a prime.

It is not a weakly prime, because it can be changed into another prime (172067227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86033628 + 86033629.

It is an arithmetic number, because the mean of its divisors is an integer number (86033629).

Almost surely, 2^172067257 is an apocalyptic number.

It is an amenable number.

172067257 is a deficient number, since it is larger than the sum of its proper divisors (1).

172067257 is an equidigital number, since it uses as much as digits as its factorization.

172067257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 172067257 is about 13117.4409470750. The cubic root of 172067257 is about 556.2022548423.

The spelling of 172067257 in words is "one hundred seventy-two million, sixty-seven thousand, two hundred fifty-seven".