810893949 has 8 divisors (see below), whose sum is σ = 1082267520. Its totient is φ = 540058176.

The previous prime is 810893947. The next prime is 810893983. The reversal of 810893949 is 949398018.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 810893949 - 2¹ = 810893947 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810893947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130917 + ... + 136970.

It is an arithmetic number, because the mean of its divisors is an integer number (135283440).

Almost surely, 2^810893949 is an apocalyptic number.

It is an amenable number.

810893949 is a deficient number, since it is larger than the sum of its proper divisors (271373571).

810893949 is a wasteful number, since it uses less digits than its factorization.

810893949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268899.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 810893949 is about 28476.1996937794. The cubic root of 810893949 is about 932.5125525459.

The spelling of 810893949 in words is "eight hundred ten million, eight hundred ninety-three thousand, nine hundred forty-nine".