1343456557 has 2 divisors, whose sum is σ = 1343456558. Its totient is φ = 1343456556.

The previous prime is 1343456549. The next prime is 1343456567. The reversal of 1343456557 is 7556543431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988096356 + 355360201 = 31434^2 + 18851^2 .

It is an emirp because it is prime and its reverse (7556543431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343456557 - 2³ = 1343456549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343456567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671728278 + 671728279.

It is an arithmetic number, because the mean of its divisors is an integer number (671728279).

Almost surely, 2^1343456557 is an apocalyptic number.

It is an amenable number.

1343456557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343456557 is an equidigital number, since it uses as much as digits as its factorization.

1343456557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 43.

The square root of 1343456557 is about 36653.1929987007. The cubic root of 1343456557 is about 1103.4209086320.

Adding to 1343456557 its reverse (7556543431), we get a palindrome (8899999988).

The spelling of 1343456557 in words is "one billion, three hundred forty-three million, four hundred fifty-six thousand, five hundred fifty-seven".