1320878029 has 2 divisors, whose sum is σ = 1320878030. Its totient is φ = 1320878028.

The previous prime is 1320878011. The next prime is 1320878057. The reversal of 1320878029 is 9208780231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 953389129 + 367488900 = 30877^2 + 19170^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320878029 - 2²³ = 1312489421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320877982 and 1320878000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320878129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660439014 + 660439015.

It is an arithmetic number, because the mean of its divisors is an integer number (660439015).

Almost surely, 2^1320878029 is an apocalyptic number.

It is an amenable number.

1320878029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320878029 is an equidigital number, since it uses as much as digits as its factorization.

1320878029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1320878029 is about 36343.8857168575. The cubic root of 1320878029 is about 1097.2044797705.

The spelling of 1320878029 in words is "one billion, three hundred twenty million, eight hundred seventy-eight thousand, twenty-nine".