1681763263 has 2 divisors, whose sum is σ = 1681763264. Its totient is φ = 1681763262.

The previous prime is 1681763203. The next prime is 1681763309. The reversal of 1681763263 is 3623671861.

It is a strong prime.

It is an emirp because it is prime and its reverse (3623671861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1681763263 - 2¹³ = 1681755071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1681763203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840881631 + 840881632.

It is an arithmetic number, because the mean of its divisors is an integer number (840881632).

Almost surely, 2^1681763263 is an apocalyptic number.

1681763263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1681763263 is an equidigital number, since it uses as much as digits as its factorization.

1681763263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 1681763263 is about 41009.3070290148. The cubic root of 1681763263 is about 1189.2001458335.

The spelling of 1681763263 in words is "one billion, six hundred eighty-one million, seven hundred sixty-three thousand, two hundred sixty-three".