813497339 has 4 divisors (see below), whose sum is σ = 824955120. Its totient is φ = 802039560.

The previous prime is 813497309. The next prime is 813497341. The reversal of 813497339 is 933794318.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933794318 = 2 ⋅466897159.

It is a cyclic number.

It is not a de Polignac number, because 813497339 - 2¹² = 813493243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813497293 and 813497302.

It is not an unprimeable number, because it can be changed into a prime (813497309) 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, 5728784 + ... + 5728925.

It is an arithmetic number, because the mean of its divisors is an integer number (206238780).

Almost surely, 2^813497339 is an apocalyptic number.

813497339 is a deficient number, since it is larger than the sum of its proper divisors (11457781).

813497339 is a wasteful number, since it uses less digits than its factorization.

813497339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11457780.

The product of its digits is 489888, while the sum is 47.

The square root of 813497339 is about 28521.8747455352. The cubic root of 813497339 is about 933.5094360591.

It can be divided in two parts, 81349 and 7339, that added together give a palindrome (88688).

The spelling of 813497339 in words is "eight hundred thirteen million, four hundred ninety-seven thousand, three hundred thirty-nine".