813745293 has 4 divisors (see below), whose sum is σ = 1084993728. Its totient is φ = 542496860.

The previous prime is 813745259. The next prime is 813745297. The reversal of 813745293 is 392547318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 813745293 - 2¹³ = 813737101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813745297) 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, 135624213 + ... + 135624218.

It is an arithmetic number, because the mean of its divisors is an integer number (271248432).

Almost surely, 2^813745293 is an apocalyptic number.

It is an amenable number.

813745293 is a deficient number, since it is larger than the sum of its proper divisors (271248435).

813745293 is a wasteful number, since it uses less digits than its factorization.

813745293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271248434.

The product of its digits is 181440, while the sum is 42.

The square root of 813745293 is about 28526.2211482699. The cubic root of 813745293 is about 933.6042709875.

The spelling of 813745293 in words is "eight hundred thirteen million, seven hundred forty-five thousand, two hundred ninety-three".