172606243 has 2 divisors, whose sum is σ = 172606244. Its totient is φ = 172606242.

The previous prime is 172606207. The next prime is 172606303. The reversal of 172606243 is 342606271.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172606243 is a prime.

It is not a weakly prime, because it can be changed into another prime (172676243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86303121 + 86303122.

It is an arithmetic number, because the mean of its divisors is an integer number (86303122).

Almost surely, 2^172606243 is an apocalyptic number.

172606243 is a deficient number, since it is larger than the sum of its proper divisors (1).

172606243 is an equidigital number, since it uses as much as digits as its factorization.

172606243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 172606243 is about 13137.9695158727. The cubic root of 172606243 is about 556.7824015441.

The spelling of 172606243 in words is "one hundred seventy-two million, six hundred six thousand, two hundred forty-three".