172664633 has 2 divisors, whose sum is σ = 172664634. Its totient is φ = 172664632.

The previous prime is 172664629. The next prime is 172664671. The reversal of 172664633 is 336466271.

172664633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (172664671) can be obtained adding 172664633 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148181929 + 24482704 = 12173^2 + 4948^2 .

It is a cyclic number.

It is not a de Polignac number, because 172664633 - 2² = 172664629 is a prime.

It is not a weakly prime, because it can be changed into another prime (172664623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86332316 + 86332317.

It is an arithmetic number, because the mean of its divisors is an integer number (86332317).

Almost surely, 2^172664633 is an apocalyptic number.

It is an amenable number.

172664633 is a deficient number, since it is larger than the sum of its proper divisors (1).

172664633 is an equidigital number, since it uses as much as digits as its factorization.

172664633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 172664633 is about 13140.1915130640. The cubic root of 172664633 is about 556.8451780668.

The spelling of 172664633 in words is "one hundred seventy-two million, six hundred sixty-four thousand, six hundred thirty-three".