1355356243 has 2 divisors, whose sum is σ = 1355356244. Its totient is φ = 1355356242.

The previous prime is 1355356193. The next prime is 1355356253. The reversal of 1355356243 is 3426535531.

It is a strong prime.

It is an emirp because it is prime and its reverse (3426535531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1355356243 - 2²¹ = 1353259091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355356253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677678121 + 677678122.

It is an arithmetic number, because the mean of its divisors is an integer number (677678122).

Almost surely, 2^1355356243 is an apocalyptic number.

1355356243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355356243 is an equidigital number, since it uses as much as digits as its factorization.

1355356243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 37.

The square root of 1355356243 is about 36815.1632211511. The cubic root of 1355356243 is about 1106.6691924367.

It can be divided in two parts, 135535 and 6243, that added together give a triangular number (141778 = T₅₃₂).

The spelling of 1355356243 in words is "one billion, three hundred fifty-five million, three hundred fifty-six thousand, two hundred forty-three".