7683683621 has 2 divisors, whose sum is σ = 7683683622. Its totient is φ = 7683683620.

The previous prime is 7683683617. The next prime is 7683683633. The reversal of 7683683621 is 1263863867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5234522500 + 2449161121 = 72350^2 + 49489^2 .

It is a cyclic number.

It is not a de Polignac number, because 7683683621 - 2² = 7683683617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7683683621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7683683611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841841810 + 3841841811.

It is an arithmetic number, because the mean of its divisors is an integer number (3841841811).

Almost surely, 2^7683683621 is an apocalyptic number.

It is an amenable number.

7683683621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7683683621 is an equidigital number, since it uses as much as digits as its factorization.

7683683621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 7683683621 is about 87656.6233721103. The cubic root of 7683683621 is about 1973.2850462191.

The spelling of 7683683621 in words is "seven billion, six hundred eighty-three million, six hundred eighty-three thousand, six hundred twenty-one".