800477981 has 8 divisors (see below), whose sum is σ = 847339680. Its totient is φ = 754900272.

The previous prime is 800477971. The next prime is 800477983. The reversal of 800477981 is 189774008.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800477981 is a prime.

It is a super-2 number, since 2×800477981² = 1281529996131672722, 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 (800477983) 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, 319715 + ... + 322208.

It is an arithmetic number, because the mean of its divisors is an integer number (105917460).

Almost surely, 2^800477981 is an apocalyptic number.

It is an amenable number.

800477981 is a deficient number, since it is larger than the sum of its proper divisors (46861699).

800477981 is a wasteful number, since it uses less digits than its factorization.

800477981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641995.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 800477981 is about 28292.7195758909. The cubic root of 800477981 is about 928.5026125198.

The spelling of 800477981 in words is "eight hundred million, four hundred seventy-seven thousand, nine hundred eighty-one".