1343561771 has 4 divisors (see below), whose sum is σ = 1343638200. Its totient is φ = 1343485344.

The previous prime is 1343561741. The next prime is 1343561777. The reversal of 1343561771 is 1771653431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1343561771 - 2²² = 1339367467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1343561777) 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, 2900 + ... + 51918.

It is an arithmetic number, because the mean of its divisors is an integer number (335909550).

Almost surely, 2^1343561771 is an apocalyptic number.

1343561771 is a deficient number, since it is larger than the sum of its proper divisors (76429).

1343561771 is an equidigital number, since it uses as much as digits as its factorization.

1343561771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76428.

The product of its digits is 52920, while the sum is 38.

The square root of 1343561771 is about 36654.6282343717. The cubic root of 1343561771 is about 1103.4497130113.

The spelling of 1343561771 in words is "one billion, three hundred forty-three million, five hundred sixty-one thousand, seven hundred seventy-one".