681283885 has 8 divisors (see below), whose sum is σ = 825635736. Its totient is φ = 539630400.

The previous prime is 681283877. The next prime is 681283901. The reversal of 681283885 is 588382186.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 468765801 + 212518084 = 21651^2 + 14578^2 .

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

It is not a de Polignac number, because 681283885 - 2³ = 681283877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674034 + ... + 675043.

It is an arithmetic number, because the mean of its divisors is an integer number (103204467).

Almost surely, 2^681283885 is an apocalyptic number.

It is an amenable number.

681283885 is a deficient number, since it is larger than the sum of its proper divisors (144351851).

681283885 is a wasteful number, since it uses less digits than its factorization.

681283885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349183.

The product of its digits is 737280, while the sum is 49.

The square root of 681283885 is about 26101.4153830784. The cubic root of 681283885 is about 879.9190201826.

The spelling of 681283885 in words is "six hundred eighty-one million, two hundred eighty-three thousand, eight hundred eighty-five".