1681018927 has 16 divisors (see below), whose sum is σ = 1993254912. Its totient is φ = 1387280160.

The previous prime is 1681018921. The next prime is 1681018931. The reversal of 1681018927 is 7298101861.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1681018927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681018921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23088 + ... + 62410.

It is an arithmetic number, because the mean of its divisors is an integer number (124578432).

Almost surely, 2^1681018927 is an apocalyptic number.

1681018927 is a deficient number, since it is larger than the sum of its proper divisors (312235985).

1681018927 is a wasteful number, since it uses less digits than its factorization.

1681018927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39558.

The product of its (nonzero) digits is 48384, while the sum is 43.

The square root of 1681018927 is about 41000.2308164235. The cubic root of 1681018927 is about 1189.0246762098.

The spelling of 1681018927 in words is "one billion, six hundred eighty-one million, eighteen thousand, nine hundred twenty-seven".