172979627 has 2 divisors, whose sum is σ = 172979628. Its totient is φ = 172979626.

The previous prime is 172979623. The next prime is 172979633. The reversal of 172979627 is 726979271.

It is a weak prime.

It is an emirp because it is prime and its reverse (726979271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172979627 - 2² = 172979623 is a prime.

It is not a weakly prime, because it can be changed into another prime (172979623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86489813 + 86489814.

It is an arithmetic number, because the mean of its divisors is an integer number (86489814).

Almost surely, 2^172979627 is an apocalyptic number.

172979627 is a deficient number, since it is larger than the sum of its proper divisors (1).

172979627 is an equidigital number, since it uses as much as digits as its factorization.

172979627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 50.

The square root of 172979627 is about 13152.1719499100. The cubic root of 172979627 is about 557.1835919655.

The spelling of 172979627 in words is "one hundred seventy-two million, nine hundred seventy-nine thousand, six hundred twenty-seven".