1343768891 has 8 divisors (see below), whose sum is σ = 1377088944. Its totient is φ = 1310474880.

The previous prime is 1343768819. The next prime is 1343768941. The reversal of 1343768891 is 1988673431.

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

It is a cyclic number.

It is not a de Polignac number, because 1343768891 - 2³⁰ = 270027067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1342768891) 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, 135980 + ... + 145526.

It is an arithmetic number, because the mean of its divisors is an integer number (172136118).

Almost surely, 2^1343768891 is an apocalyptic number.

1343768891 is a deficient number, since it is larger than the sum of its proper divisors (33320053).

1343768891 is an equidigital number, since it uses as much as digits as its factorization.

1343768891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13021.

The product of its digits is 870912, while the sum is 50.

The square root of 1343768891 is about 36657.4534167337. The cubic root of 1343768891 is about 1103.5064117471.

It can be divided in two parts, 13437 and 68891, that added together give a palindrome (82328).

The spelling of 1343768891 in words is "one billion, three hundred forty-three million, seven hundred sixty-eight thousand, eight hundred ninety-one".