805981623 has 8 divisors (see below), whose sum is σ = 1074865008. Its totient is φ = 537209664.

The previous prime is 805981613. The next prime is 805981667. The reversal of 805981623 is 326189508.

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

It is not a de Polignac number, because 805981623 - 2⁶ = 805981559 is a prime.

It is a super-2 number, since 2×805981623² = 1299212753227428258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805981613) 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, 9190 + ... + 41187.

It is an arithmetic number, because the mean of its divisors is an integer number (134358126).

Almost surely, 2^805981623 is an apocalyptic number.

805981623 is a deficient number, since it is larger than the sum of its proper divisors (268883385).

805981623 is a wasteful number, since it uses less digits than its factorization.

805981623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55713.

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

The square root of 805981623 is about 28389.8154802035. The cubic root of 805981623 is about 930.6257102682.

The spelling of 805981623 in words is "eight hundred five million, nine hundred eighty-one thousand, six hundred twenty-three".