172245863 has 2 divisors, whose sum is σ = 172245864. Its totient is φ = 172245862.

The previous prime is 172245847. The next prime is 172245911. The reversal of 172245863 is 368542271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172245863 - 2⁴ = 172245847 is a prime.

It is a super-2 number, since 2×172245863² = 59337274641229538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172245803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86122931 + 86122932.

It is an arithmetic number, because the mean of its divisors is an integer number (86122932).

Almost surely, 2^172245863 is an apocalyptic number.

172245863 is a deficient number, since it is larger than the sum of its proper divisors (1).

172245863 is an equidigital number, since it uses as much as digits as its factorization.

172245863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 172245863 is about 13124.2471403125. The cubic root of 172245863 is about 556.3946344762.

The spelling of 172245863 in words is "one hundred seventy-two million, two hundred forty-five thousand, eight hundred sixty-three".