1320690369 has 16 divisors (see below), whose sum is σ = 1768419072. Its totient is φ = 876720768.

The previous prime is 1320690359. The next prime is 1320690389. The reversal of 1320690369 is 9630960231.

It is not a de Polignac number, because 1320690369 - 2⁸ = 1320690113 is a prime.

It is a super-2 number, since 2×1320690369² = 3488446101538712322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320690359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1106437 + ... + 1107629.

It is an arithmetic number, because the mean of its divisors is an integer number (110526192).

Almost surely, 2^1320690369 is an apocalyptic number.

It is an amenable number.

1320690369 is a deficient number, since it is larger than the sum of its proper divisors (447728703).

1320690369 is a wasteful number, since it uses less digits than its factorization.

1320690369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 1320690369 is about 36341.3038979066. The cubic root of 1320690369 is about 1097.1525165713.

The spelling of 1320690369 in words is "one billion, three hundred twenty million, six hundred ninety thousand, three hundred sixty-nine".