1320813049 has 2 divisors, whose sum is σ = 1320813050. Its totient is φ = 1320813048.

The previous prime is 1320813037. The next prime is 1320813083. The reversal of 1320813049 is 9403180231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1278563049 + 42250000 = 35757^2 + 6500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320813049 - 2⁷ = 1320812921 is a prime.

It is a super-2 number, since 2×1320813049² = 3489094220817352802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320813049.

It is not a weakly prime, because it can be changed into another prime (1320853049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660406524 + 660406525.

It is an arithmetic number, because the mean of its divisors is an integer number (660406525).

Almost surely, 2^1320813049 is an apocalyptic number.

It is an amenable number.

1320813049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320813049 is an equidigital number, since it uses as much as digits as its factorization.

1320813049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1320813049 is about 36342.9917453145. The cubic root of 1320813049 is about 1097.1864873153.

The spelling of 1320813049 in words is "one billion, three hundred twenty million, eight hundred thirteen thousand, forty-nine".