1680344401 has 4 divisors (see below), whose sum is σ = 1768783600. Its totient is φ = 1591905204.

The previous prime is 1680344387. The next prime is 1680344437. The reversal of 1680344401 is 1044430861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1680344401 - 2⁷ = 1680344273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680344461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44219571 + ... + 44219608.

It is an arithmetic number, because the mean of its divisors is an integer number (442195900).

Almost surely, 2^1680344401 is an apocalyptic number.

It is an amenable number.

1680344401 is a deficient number, since it is larger than the sum of its proper divisors (88439199).

1680344401 is an equidigital number, since it uses as much as digits as its factorization.

1680344401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88439198.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1680344401 is about 40992.0041105580. The cubic root of 1680344401 is about 1188.8656188382.

The spelling of 1680344401 in words is "one billion, six hundred eighty million, three hundred forty-four thousand, four hundred one".