172870567 has 2 divisors, whose sum is σ = 172870568. Its totient is φ = 172870566.

The previous prime is 172870517. The next prime is 172870583. The reversal of 172870567 is 765078271.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172870567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172870517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86435283 + 86435284.

It is an arithmetic number, because the mean of its divisors is an integer number (86435284).

Almost surely, 2^172870567 is an apocalyptic number.

172870567 is a deficient number, since it is larger than the sum of its proper divisors (1).

172870567 is an equidigital number, since it uses as much as digits as its factorization.

172870567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 43.

The square root of 172870567 is about 13148.0252129360. The cubic root of 172870567 is about 557.0664698536.

The spelling of 172870567 in words is "one hundred seventy-two million, eight hundred seventy thousand, five hundred sixty-seven".