129643627 has 2 divisors, whose sum is σ = 129643628. Its totient is φ = 129643626.

The previous prime is 129643621. The next prime is 129643637. The reversal of 129643627 is 726346921.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (726346921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129643627 - 2²³ = 121255019 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129643627.

It is not a weakly prime, because it can be changed into another prime (129643621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64821813 + 64821814.

It is an arithmetic number, because the mean of its divisors is an integer number (64821814).

Almost surely, 2^129643627 is an apocalyptic number.

129643627 is a deficient number, since it is larger than the sum of its proper divisors (1).

129643627 is an equidigital number, since it uses as much as digits as its factorization.

129643627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 129643627 is about 11386.1155360377. The cubic root of 129643627 is about 506.1163774353.

The spelling of 129643627 in words is "one hundred twenty-nine million, six hundred forty-three thousand, six hundred twenty-seven".