1345628769 has 4 divisors (see below), whose sum is σ = 1794171696. Its totient is φ = 897085844.

The previous prime is 1345628743. The next prime is 1345628803. The reversal of 1345628769 is 9678265431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1345628769 - 2¹² = 1345624673 is a prime.

It is a super-2 number, since 2×1345628769² = 3621433567920910722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1345628969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224271459 + ... + 224271464.

It is an arithmetic number, because the mean of its divisors is an integer number (448542924).

Almost surely, 2^1345628769 is an apocalyptic number.

It is an amenable number.

1345628769 is a deficient number, since it is larger than the sum of its proper divisors (448542927).

1345628769 is an equidigital number, since it uses as much as digits as its factorization.

1345628769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448542926.

The product of its digits is 2177280, while the sum is 51.

The square root of 1345628769 is about 36682.8129919176. The cubic root of 1345628769 is about 1104.0152892167.

The spelling of 1345628769 in words is "one billion, three hundred forty-five million, six hundred twenty-eight thousand, seven hundred sixty-nine".