172378867 has 2 divisors, whose sum is σ = 172378868. Its totient is φ = 172378866.

The previous prime is 172378853. The next prime is 172378889. The reversal of 172378867 is 768873271.

172378867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172378867 - 2¹⁵ = 172346099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172378867.

It is not a weakly prime, because it can be changed into another prime (172378897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86189433 + 86189434.

It is an arithmetic number, because the mean of its divisors is an integer number (86189434).

Almost surely, 2^172378867 is an apocalyptic number.

172378867 is a deficient number, since it is larger than the sum of its proper divisors (1).

172378867 is an equidigital number, since it uses as much as digits as its factorization.

172378867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 49.

The square root of 172378867 is about 13129.3132722165. The cubic root of 172378867 is about 556.5378090275.

The spelling of 172378867 in words is "one hundred seventy-two million, three hundred seventy-eight thousand, eight hundred sixty-seven".