1355803729 has 24 divisors (see below), whose sum is σ = 1651528320. Its totient is φ = 1090055232.

The previous prime is 1355803711. The next prime is 1355803739. The reversal of 1355803729 is 9273085531.

It is not a de Polignac number, because 1355803729 - 2⁵ = 1355803697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355803739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 257677 + ... + 262885.

It is an arithmetic number, because the mean of its divisors is an integer number (68813680).

Almost surely, 2^1355803729 is an apocalyptic number.

1355803729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1355803729 is a deficient number, since it is larger than the sum of its proper divisors (295724591).

1355803729 is a wasteful number, since it uses less digits than its factorization.

1355803729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357 (or 5338 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1355803729 is about 36821.2401882392. The cubic root of 1355803729 is about 1106.7909720997.

The spelling of 1355803729 in words is "one billion, three hundred fifty-five million, eight hundred three thousand, seven hundred twenty-nine".