1356404239 has 2 divisors, whose sum is σ = 1356404240. Its totient is φ = 1356404238.

The previous prime is 1356404221. The next prime is 1356404267. The reversal of 1356404239 is 9324046531.

It is a weak prime.

It is an emirp because it is prime and its reverse (9324046531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1356404239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1356404198 and 1356404207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356404839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678202119 + 678202120.

It is an arithmetic number, because the mean of its divisors is an integer number (678202120).

Almost surely, 2^1356404239 is an apocalyptic number.

1356404239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356404239 is an equidigital number, since it uses as much as digits as its factorization.

1356404239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1356404239 is about 36829.3936822207. The cubic root of 1356404239 is about 1106.9543538955.

The spelling of 1356404239 in words is "one billion, three hundred fifty-six million, four hundred four thousand, two hundred thirty-nine".