172822379 has 2 divisors, whose sum is σ = 172822380. Its totient is φ = 172822378.

The previous prime is 172822259. The next prime is 172822381. The reversal of 172822379 is 973228271.

It is a strong prime.

It is an emirp because it is prime and its reverse (973228271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172822379 is a prime.

Together with 172822381, 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 (172827379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86411189 + 86411190.

It is an arithmetic number, because the mean of its divisors is an integer number (86411190).

Almost surely, 2^172822379 is an apocalyptic number.

172822379 is a deficient number, since it is larger than the sum of its proper divisors (1).

172822379 is an equidigital number, since it uses as much as digits as its factorization.

172822379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 172822379 is about 13146.1925666712. The cubic root of 172822379 is about 557.0147039300.

The spelling of 172822379 in words is "one hundred seventy-two million, eight hundred twenty-two thousand, three hundred seventy-nine".