1680137243 has 8 divisors (see below), whose sum is σ = 1744843680. Its totient is φ = 1615882240.

The previous prime is 1680137201. The next prime is 1680137269. The reversal of 1680137243 is 3427310861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1680137243 - 2⁸ = 1680136987 is a prime.

It is a super-2 number, since 2×1680137243² = 5645722310631282098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680137273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105263 + ... + 120168.

It is an arithmetic number, because the mean of its divisors is an integer number (218105460).

Almost surely, 2^1680137243 is an apocalyptic number.

1680137243 is a deficient number, since it is larger than the sum of its proper divisors (64706437).

1680137243 is a wasteful number, since it uses less digits than its factorization.

1680137243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225717.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1680137243 is about 40989.4772228190. The cubic root of 1680137243 is about 1188.8167611664.

The spelling of 1680137243 in words is "one billion, six hundred eighty million, one hundred thirty-seven thousand, two hundred forty-three".