811427073 has 4 divisors (see below), whose sum is σ = 1081902768. Its totient is φ = 540951380.

The previous prime is 811427041. The next prime is 811427083. The reversal of 811427073 is 370724118.

It is a happy number.

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 811427073 - 2⁵ = 811427041 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (811427083) 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, 135237843 + ... + 135237848.

It is an arithmetic number, because the mean of its divisors is an integer number (270475692).

Almost surely, 2^811427073 is an apocalyptic number.

It is an amenable number.

811427073 is a deficient number, since it is larger than the sum of its proper divisors (270475695).

811427073 is a wasteful number, since it uses less digits than its factorization.

811427073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270475694.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 811427073 is about 28485.5590255835. The cubic root of 811427073 is about 932.7168685820.

The spelling of 811427073 in words is "eight hundred eleven million, four hundred twenty-seven thousand, seventy-three".