1345798669 has 4 divisors (see below), whose sum is σ = 1382171644. Its totient is φ = 1309425696.

The previous prime is 1345798627. The next prime is 1345798703. The reversal of 1345798669 is 9668975431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9668975431 = 137 ⋅70576463.

It can be written as a sum of positive squares in 2 ways, for example, as 1184254569 + 161544100 = 34413^2 + 12710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345798669 is a prime.

It is a super-2 number, since 2×1345798669² = 3622348114964343122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345798369) 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, 18186432 + ... + 18186505.

It is an arithmetic number, because the mean of its divisors is an integer number (345542911).

Almost surely, 2^1345798669 is an apocalyptic number.

It is an amenable number.

1345798669 is a deficient number, since it is larger than the sum of its proper divisors (36372975).

1345798669 is an equidigital number, since it uses as much as digits as its factorization.

1345798669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36372974.

The product of its digits is 9797760, while the sum is 58.

The square root of 1345798669 is about 36685.1287172336. The cubic root of 1345798669 is about 1104.0617518341.

The spelling of 1345798669 in words is "one billion, three hundred forty-five million, seven hundred ninety-eight thousand, six hundred sixty-nine".