1680410399 has 2 divisors, whose sum is σ = 1680410400. Its totient is φ = 1680410398.

The previous prime is 1680410363. The next prime is 1680410437. The reversal of 1680410399 is 9930140861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680410399 - 2²⁰ = 1679361823 is a prime.

It is a super-3 number, since 3×1680410399³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680410999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840205199 + 840205200.

It is an arithmetic number, because the mean of its divisors is an integer number (840205200).

Almost surely, 2^1680410399 is an apocalyptic number.

1680410399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680410399 is an equidigital number, since it uses as much as digits as its factorization.

1680410399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1680410399 is about 40992.8091133067. The cubic root of 1680410399 is about 1188.8811834502.

The spelling of 1680410399 in words is "one billion, six hundred eighty million, four hundred ten thousand, three hundred ninety-nine".