1356523213 has 2 divisors, whose sum is σ = 1356523214. Its totient is φ = 1356523212.

The previous prime is 1356523151. The next prime is 1356523249. The reversal of 1356523213 is 3123256531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1348211524 + 8311689 = 36718^2 + 2883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356523213 - 2²¹ = 1354426061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356523613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678261606 + 678261607.

It is an arithmetic number, because the mean of its divisors is an integer number (678261607).

Almost surely, 2^1356523213 is an apocalyptic number.

It is an amenable number.

1356523213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356523213 is an equidigital number, since it uses as much as digits as its factorization.

1356523213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 1356523213 is about 36831.0088512384. The cubic root of 1356523213 is about 1106.9867176341.

Adding to 1356523213 its reverse (3123256531), we get a palindrome (4479779744).

The spelling of 1356523213 in words is "one billion, three hundred fifty-six million, five hundred twenty-three thousand, two hundred thirteen".