805373381 has 4 divisors (see below), whose sum is σ = 805502412. Its totient is φ = 805244352.

The previous prime is 805373369. The next prime is 805373399. The reversal of 805373381 is 183373508.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 651985156 + 153388225 = 25534^2 + 12385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-805373381 is a prime.

It is a super-2 number, since 2×805373381² = 1297252565646742322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805373581) 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, 54650 + ... + 67803.

It is an arithmetic number, because the mean of its divisors is an integer number (201375603).

Almost surely, 2^805373381 is an apocalyptic number.

It is an amenable number.

805373381 is a deficient number, since it is larger than the sum of its proper divisors (129031).

805373381 is a wasteful number, since it uses less digits than its factorization.

805373381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129030.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 805373381 is about 28379.1011309379. The cubic root of 805373381 is about 930.3915493901.

The spelling of 805373381 in words is "eight hundred five million, three hundred seventy-three thousand, three hundred eighty-one".