801981946 has 8 divisors (see below), whose sum is σ = 1204140564. Its totient is φ = 400601760.

The previous prime is 801981923. The next prime is 801981959. The reversal of 801981946 is 649189108.

It can be written as a sum of positive squares in 2 ways, for example, as 801512721 + 469225 = 28311^2 + 685^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 801981896 and 801981905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192025 + ... + 196156.

Almost surely, 2^801981946 is an apocalyptic number.

801981946 is a deficient number, since it is larger than the sum of its proper divisors (402158618).

801981946 is a wasteful number, since it uses less digits than its factorization.

801981946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389216.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 801981946 is about 28319.2857607673. The cubic root of 801981946 is about 929.0837493821.

The spelling of 801981946 in words is "eight hundred one million, nine hundred eighty-one thousand, nine hundred forty-six".