800998381 has 16 divisors (see below), whose sum is σ = 837468720. Its totient is φ = 765573120.

The previous prime is 800998361. The next prime is 800998399. The reversal of 800998381 is 183899008.

It can be written as a sum of positive squares in 8 ways, for example, as 15093225 + 785905156 = 3885^2 + 28034^2 .

It is a cyclic number.

It is not a de Polignac number, because 800998381 - 2¹¹ = 800996333 is a prime.

It is a super-2 number, since 2×800998381² = 1283196812729242322, 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 (800998361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351261 + ... + 353533.

It is an arithmetic number, because the mean of its divisors is an integer number (52341795).

Almost surely, 2^800998381 is an apocalyptic number.

It is an amenable number.

800998381 is a deficient number, since it is larger than the sum of its proper divisors (36470339).

800998381 is a wasteful number, since it uses less digits than its factorization.

800998381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496.

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

The square root of 800998381 is about 28301.9147938792. The cubic root of 800998381 is about 928.7037790308.

The spelling of 800998381 in words is "eight hundred million, nine hundred ninety-eight thousand, three hundred eighty-one".