803138261 has 4 divisors (see below), whose sum is σ = 816304524. Its totient is φ = 789972000.

The previous prime is 803138257. The next prime is 803138321. The reversal of 803138261 is 162831308.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324360100 + 478778161 = 18010^2 + 21881^2 .

It is a cyclic number.

It is not a de Polignac number, because 803138261 - 2² = 803138257 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 (803138561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6583040 + ... + 6583161.

It is an arithmetic number, because the mean of its divisors is an integer number (204076131).

Almost surely, 2^803138261 is an apocalyptic number.

It is an amenable number.

803138261 is a deficient number, since it is larger than the sum of its proper divisors (13166263).

803138261 is a wasteful number, since it uses less digits than its factorization.

803138261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166262.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 803138261 is about 28339.6940879749. The cubic root of 803138261 is about 929.5300593319.

Adding to 803138261 its reverse (162831308), we get a palindrome (965969569).

The spelling of 803138261 in words is "eight hundred three million, one hundred thirty-eight thousand, two hundred sixty-one".