172678313 has 2 divisors, whose sum is σ = 172678314. Its totient is φ = 172678312.

The previous prime is 172678291. The next prime is 172678321. The reversal of 172678313 is 313876271.

172678313 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 can be written as a sum of positive squares in only one way, i.e., 167624809 + 5053504 = 12947^2 + 2248^2 .

It is a cyclic number.

It is not a de Polignac number, because 172678313 - 2⁸ = 172678057 is a prime.

It is not a weakly prime, because it can be changed into another prime (172678613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86339156 + 86339157.

It is an arithmetic number, because the mean of its divisors is an integer number (86339157).

Almost surely, 2^172678313 is an apocalyptic number.

It is an amenable number.

172678313 is a deficient number, since it is larger than the sum of its proper divisors (1).

172678313 is an equidigital number, since it uses as much as digits as its factorization.

172678313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 172678313 is about 13140.7120431124. The cubic root of 172678313 is about 556.8598837243.

The spelling of 172678313 in words is "one hundred seventy-two million, six hundred seventy-eight thousand, three hundred thirteen".