1680131902 has 4 divisors (see below), whose sum is σ = 2520197856. Its totient is φ = 840065950.

The previous prime is 1680131881. The next prime is 1680131903. The reversal of 1680131902 is 2091310861.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680131903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420032974 + ... + 420032977.

It is an arithmetic number, because the mean of its divisors is an integer number (630049464).

Almost surely, 2^1680131902 is an apocalyptic number.

1680131902 is a deficient number, since it is larger than the sum of its proper divisors (840065954).

1680131902 is an equidigital number, since it uses as much as digits as its factorization.

1680131902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840065953.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1680131902 is about 40989.4120718997. The cubic root of 1680131902 is about 1188.8155014525.

The spelling of 1680131902 in words is "one billion, six hundred eighty million, one hundred thirty-one thousand, nine hundred two".