801399481 has 3 divisors (see below), whose sum is σ = 801427791. Its totient is φ = 801371172.

The previous prime is 801399479. The next prime is 801399509. The reversal of 801399481 is 184993108.

The square root of 801399481 is 28309.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 342583081 + 458816400 = 18509^2 + 21420^2 .

It is not a de Polignac number, because 801399481 - 2¹ = 801399479 is a prime.

It is a super-2 number, since 2×801399481² = 1284482256294138722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801399421) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14155 + ... + 42463.

It is an arithmetic number, because the mean of its divisors is an integer number (267142597).

Almost surely, 2^801399481 is an apocalyptic number.

801399481 is the 28309-th square number.

801399481 is the 14155-th centered octagonal number.

It is an amenable number.

801399481 is a deficient number, since it is larger than the sum of its proper divisors (28310).

801399481 is an frugal number, since it uses more digits than its factorization.

801399481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56618 (or 28309 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The cubic root of 801399481 is about 928.8587693258.

The spelling of 801399481 in words is "eight hundred one million, three hundred ninety-nine thousand, four hundred eighty-one".