813893541 has 4 divisors (see below), whose sum is σ = 1085191392. Its totient is φ = 542595692.

The previous prime is 813893459. The next prime is 813893579. The reversal of 813893541 is 145398318.

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 813893541 - 2¹⁴ = 813877157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 813893493 and 813893502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813893441) 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, 135648921 + ... + 135648926.

It is an arithmetic number, because the mean of its divisors is an integer number (271297848).

Almost surely, 2^813893541 is an apocalyptic number.

It is an amenable number.

813893541 is a deficient number, since it is larger than the sum of its proper divisors (271297851).

813893541 is a wasteful number, since it uses less digits than its factorization.

813893541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271297850.

The product of its digits is 103680, while the sum is 42.

The square root of 813893541 is about 28528.8194813595. The cubic root of 813893541 is about 933.6609621754.

The spelling of 813893541 in words is "eight hundred thirteen million, eight hundred ninety-three thousand, five hundred forty-one".