1345688999 has 8 divisors (see below), whose sum is σ = 1377776400. Its totient is φ = 1313637696.

The previous prime is 1345688963. The next prime is 1345689011. The reversal of 1345688999 is 9998865431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1345688999 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345688299) 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, 75779 + ... + 91835.

It is an arithmetic number, because the mean of its divisors is an integer number (172222050).

Almost surely, 2^1345688999 is an apocalyptic number.

1345688999 is a deficient number, since it is larger than the sum of its proper divisors (32087401).

1345688999 is a wasteful number, since it uses less digits than its factorization.

1345688999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18049.

The product of its digits is 16796160, while the sum is 62.

The square root of 1345688999 is about 36683.6339394014. The cubic root of 1345688999 is about 1104.0317607851.

The spelling of 1345688999 in words is "one billion, three hundred forty-five million, six hundred eighty-eight thousand, nine hundred ninety-nine".