1681877373 has 48 divisors (see below), whose sum is σ = 2516828160. Its totient is φ = 998094240.

The previous prime is 1681877363. The next prime is 1681877387. The reversal of 1681877373 is 3737781861.

It is a happy number.

It is not a de Polignac number, because 1681877373 - 2⁴ = 1681877357 is a prime.

It is a super-2 number, since 2×1681877373² = 5657422995618762258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681877333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6394840 + ... + 6395102.

It is an arithmetic number, because the mean of its divisors is an integer number (52433920).

Almost surely, 2^1681877373 is an apocalyptic number.

It is an amenable number.

1681877373 is a deficient number, since it is larger than the sum of its proper divisors (834950787).

1681877373 is a wasteful number, since it uses less digits than its factorization.

1681877373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 579 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 1681877373 is about 41010.6982749624. The cubic root of 1681877373 is about 1189.2270415254.

The spelling of 1681877373 in words is "one billion, six hundred eighty-one million, eight hundred seventy-seven thousand, three hundred seventy-three".