805144731 has 4 divisors (see below), whose sum is σ = 1073526312. Its totient is φ = 536763152.

The previous prime is 805144729. The next prime is 805144793. The reversal of 805144731 is 137441508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 805144731 - 2¹ = 805144729 is a prime.

It is a super-2 number, since 2×805144731² = 1296516075714124722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 805144692 and 805144701.

It is not an unprimeable number, because it can be changed into a prime (805144631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134190786 + ... + 134190791.

It is an arithmetic number, because the mean of its divisors is an integer number (268381578).

Almost surely, 2^805144731 is an apocalyptic number.

805144731 is a deficient number, since it is larger than the sum of its proper divisors (268381581).

805144731 is a wasteful number, since it uses less digits than its factorization.

805144731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268381580.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 805144731 is about 28375.0723523307. The cubic root of 805144731 is about 930.3034932710.

The spelling of 805144731 in words is "eight hundred five million, one hundred forty-four thousand, seven hundred thirty-one".