805672981 has 8 divisors (see below), whose sum is σ = 847355904. Its totient is φ = 764970960.

The previous prime is 805672969. The next prime is 805672999. The reversal of 805672981 is 189276508.

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

It is a cyclic number.

It is not a de Polignac number, because 805672981 - 2⁷ = 805672853 is a prime.

It is a super-2 number, since 2×805672981² = 1298217904626852722, 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 (805672951) 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, 243541 + ... + 246826.

It is an arithmetic number, because the mean of its divisors is an integer number (105919488).

Almost surely, 2^805672981 is an apocalyptic number.

It is an amenable number.

805672981 is a deficient number, since it is larger than the sum of its proper divisors (41682923).

805672981 is a wasteful number, since it uses less digits than its factorization.

805672981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490451.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 805672981 is about 28384.3791723546. The cubic root of 805672981 is about 930.5069040638.

The spelling of 805672981 in words is "eight hundred five million, six hundred seventy-two thousand, nine hundred eighty-one".