1681305292 has 6 divisors (see below), whose sum is σ = 2942284268. Its totient is φ = 840652644.

The previous prime is 1681305281. The next prime is 1681305299. The reversal of 1681305292 is 2925031861.

It is not an unprimeable number, because it can be changed into a prime (1681305299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210163158 + ... + 210163165.

Almost surely, 2^1681305292 is an apocalyptic number.

It is an amenable number.

1681305292 is a deficient number, since it is larger than the sum of its proper divisors (1260978976).

1681305292 is a wasteful number, since it uses less digits than its factorization.

1681305292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420326327 (or 420326325 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1681305292 is about 41003.7229041462. The cubic root of 1681305292 is about 1189.0921899685.

The spelling of 1681305292 in words is "one billion, six hundred eighty-one million, three hundred five thousand, two hundred ninety-two".