1320899345 has 8 divisors (see below), whose sum is σ = 1586152680. Its totient is φ = 1056003840.

The previous prime is 1320899341. The next prime is 1320899357. The reversal of 1320899345 is 5439980231.

It can be written as a sum of positive squares in 4 ways, for example, as 7054336 + 1313845009 = 2656^2 + 36247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320899345 - 2² = 1320899341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320899296 and 1320899305.

It is not an unprimeable number, because it can be changed into a prime (1320899341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81266 + ... + 96155.

It is an arithmetic number, because the mean of its divisors is an integer number (198269085).

Almost surely, 2^1320899345 is an apocalyptic number.

It is an amenable number.

1320899345 is a deficient number, since it is larger than the sum of its proper divisors (265253335).

1320899345 is a wasteful number, since it uses less digits than its factorization.

1320899345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178915.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 1320899345 is about 36344.1789699534. The cubic root of 1320899345 is about 1097.2103818761.

The spelling of 1320899345 in words is "one billion, three hundred twenty million, eight hundred ninety-nine thousand, three hundred forty-five".