320775129 has 12 divisors (see below), whose sum is σ = 463732516. Its totient is φ = 213669792.

The previous prime is 320775127. The next prime is 320775131. The reversal of 320775129 is 921577023.

It is an interprime number because it is at equal distance from previous prime (320775127) and next prime (320775131).

It can be written as a sum of positive squares in 2 ways, for example, as 143352729 + 177422400 = 11973^2 + 13320^2 .

It is not a de Polignac number, because 320775129 - 2¹ = 320775127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320775093 and 320775102.

It is not an unprimeable number, because it can be changed into a prime (320775121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3274 + ... + 25539.

Almost surely, 2^320775129 is an apocalyptic number.

It is an amenable number.

320775129 is a deficient number, since it is larger than the sum of its proper divisors (142957387).

320775129 is a wasteful number, since it uses less digits than its factorization.

320775129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30056 (or 30053 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 320775129 is about 17910.1962300808. The cubic root of 320775129 is about 684.5422049953.

The spelling of 320775129 in words is "three hundred twenty million, seven hundred seventy-five thousand, one hundred twenty-nine".