7682990621 has 4 divisors (see below), whose sum is σ = 7685503644. Its totient is φ = 7680477600.

The previous prime is 7682990543. The next prime is 7682990647. The reversal of 7682990621 is 1260992867.

It is a happy number.

7682990621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6854184100 + 828806521 = 82790^2 + 28789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7682990621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7682990621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7682990671) 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, 1251920 + ... + 1258041.

It is an arithmetic number, because the mean of its divisors is an integer number (1921375911).

Almost surely, 2^7682990621 is an apocalyptic number.

It is an amenable number.

7682990621 is a deficient number, since it is larger than the sum of its proper divisors (2513023).

7682990621 is a wasteful number, since it uses less digits than its factorization.

7682990621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513022.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 7682990621 is about 87652.6703586377. The cubic root of 7682990621 is about 1973.2257201754.

The spelling of 7682990621 in words is "seven billion, six hundred eighty-two million, nine hundred ninety thousand, six hundred twenty-one".