172206623 has 2 divisors, whose sum is σ = 172206624. Its totient is φ = 172206622.

The previous prime is 172206613. The next prime is 172206631. The reversal of 172206623 is 326602271.

172206623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172206623 - 2¹⁰ = 172205599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172206613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86103311 + 86103312.

It is an arithmetic number, because the mean of its divisors is an integer number (86103312).

Almost surely, 2^172206623 is an apocalyptic number.

172206623 is a deficient number, since it is larger than the sum of its proper divisors (1).

172206623 is an equidigital number, since it uses as much as digits as its factorization.

172206623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 172206623 is about 13122.7521122667. The cubic root of 172206623 is about 556.3523797920.

Adding to 172206623 its reverse (326602271), we get a palindrome (498808894).

The spelling of 172206623 in words is "one hundred seventy-two million, two hundred six thousand, six hundred twenty-three".