1681943043 has 32 divisors (see below), whose sum is σ = 2486195712. Its totient is φ = 1002931200.

The previous prime is 1681943033. The next prime is 1681943051. The reversal of 1681943043 is 3403491861.

It is not a de Polignac number, because 1681943043 - 2⁴ = 1681943027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1681942992 and 1681943010.

It is not an unprimeable number, because it can be changed into a prime (1681943033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577930 + ... + 580832.

It is an arithmetic number, because the mean of its divisors is an integer number (77693616).

Almost surely, 2^1681943043 is an apocalyptic number.

1681943043 is a deficient number, since it is larger than the sum of its proper divisors (804252669).

1681943043 is a wasteful number, since it uses less digits than its factorization.

1681943043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1681943043 is about 41011.4989118906. The cubic root of 1681943043 is about 1189.2425193727.

The spelling of 1681943043 in words is "one billion, six hundred eighty-one million, nine hundred forty-three thousand, forty-three".