1355780839 has 16 divisors (see below), whose sum is σ = 1625333760. Its totient is φ = 1105727040.

The previous prime is 1355780837. The next prime is 1355780849. The reversal of 1355780839 is 9380875531.

It is a cyclic number.

It is not a de Polignac number, because 1355780839 - 2¹ = 1355780837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1355780792 and 1355780801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355780837) 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 in 15 ways as a sum of consecutive naturals, for example, 8707 + ... + 52795.

It is an arithmetic number, because the mean of its divisors is an integer number (101583360).

Almost surely, 2^1355780839 is an apocalyptic number.

1355780839 is a deficient number, since it is larger than the sum of its proper divisors (269552921).

1355780839 is a wasteful number, since it uses less digits than its factorization.

1355780839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44310.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 1355780839 is about 36820.9293608947. The cubic root of 1355780839 is about 1106.7847434233.

The spelling of 1355780839 in words is "one billion, three hundred fifty-five million, seven hundred eighty thousand, eight hundred thirty-nine".