320627129 has 2 divisors, whose sum is σ = 320627130. Its totient is φ = 320627128.

The previous prime is 320627059. The next prime is 320627137. The reversal of 320627129 is 921726023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242269225 + 78357904 = 15565^2 + 8852^2 .

It is a cyclic number.

It is not a de Polignac number, because 320627129 - 2¹² = 320623033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320627095 and 320627104.

It is not a weakly prime, because it can be changed into another prime (320627159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160313564 + 160313565.

It is an arithmetic number, because the mean of its divisors is an integer number (160313565).

Almost surely, 2^320627129 is an apocalyptic number.

It is an amenable number.

320627129 is a deficient number, since it is larger than the sum of its proper divisors (1).

320627129 is an equidigital number, since it uses as much as digits as its factorization.

320627129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 320627129 is about 17906.0640287027. The cubic root of 320627129 is about 684.4369102239.

The spelling of 320627129 in words is "three hundred twenty million, six hundred twenty-seven thousand, one hundred twenty-nine".