172807379 has 2 divisors, whose sum is σ = 172807380. Its totient is φ = 172807378.

The previous prime is 172807367. The next prime is 172807381. The reversal of 172807379 is 973708271.

172807379 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 172807379 - 2⁸ = 172807123 is a prime.

Together with 172807381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172807309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86403689 + 86403690.

It is an arithmetic number, because the mean of its divisors is an integer number (86403690).

Almost surely, 2^172807379 is an apocalyptic number.

172807379 is a deficient number, since it is larger than the sum of its proper divisors (1).

172807379 is an equidigital number, since it uses as much as digits as its factorization.

172807379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 172807379 is about 13145.6220469022. The cubic root of 172807379 is about 556.9985882272.

The spelling of 172807379 in words is "one hundred seventy-two million, eight hundred seven thousand, three hundred seventy-nine".