129772327 has 2 divisors, whose sum is σ = 129772328. Its totient is φ = 129772326.

The previous prime is 129772289. The next prime is 129772333. The reversal of 129772327 is 723277921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129772327 - 2¹⁹ = 129248039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129772327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129772387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64886163 + 64886164.

It is an arithmetic number, because the mean of its divisors is an integer number (64886164).

Almost surely, 2^129772327 is an apocalyptic number.

129772327 is a deficient number, since it is larger than the sum of its proper divisors (1).

129772327 is an equidigital number, since it uses as much as digits as its factorization.

129772327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 129772327 is about 11391.7657542630. The cubic root of 129772327 is about 506.2837995622.

The spelling of 129772327 in words is "one hundred twenty-nine million, seven hundred seventy-two thousand, three hundred twenty-seven".