1680018623 has 2 divisors, whose sum is σ = 1680018624. Its totient is φ = 1680018622.

The previous prime is 1680018577. The next prime is 1680018631. The reversal of 1680018623 is 3268100861.

It is a strong prime.

It is an emirp because it is prime and its reverse (3268100861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680018623 - 2¹⁴ = 1680002239 is a prime.

It is a super-2 number, since 2×1680018623² = 5644925147253632258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680011623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840009311 + 840009312.

It is an arithmetic number, because the mean of its divisors is an integer number (840009312).

Almost surely, 2^1680018623 is an apocalyptic number.

1680018623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680018623 is an equidigital number, since it uses as much as digits as its factorization.

1680018623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1680018623 is about 40988.0302405471. The cubic root of 1680018623 is about 1188.7887831419.

The spelling of 1680018623 in words is "one billion, six hundred eighty million, eighteen thousand, six hundred twenty-three".