8990642761 has 3 divisors (see below), whose sum is σ = 8990737581. Its totient is φ = 8990547942.

The previous prime is 8990642743. The next prime is 8990642789. The reversal of 8990642761 is 1672460998.

It is a happy number.

The square root of 8990642761 is 94819.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 8990642761 - 2¹¹ = 8990640713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8990642699 and 8990642708.

It is not an unprimeable number, because it can be changed into a prime (8990642701) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 47410 + ... + 142228.

It is an arithmetic number, because the mean of its divisors is an integer number (2996912527).

Almost surely, 2^8990642761 is an apocalyptic number.

8990642761 is the 94819-th square number.

8990642761 is the 47410-th centered octagonal number.

It is an amenable number.

8990642761 is a deficient number, since it is larger than the sum of its proper divisors (94820).

8990642761 is an frugal number, since it uses more digits than its factorization.

8990642761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189638 (or 94819 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The cubic root of 8990642761 is about 2079.3626900576.

The spelling of 8990642761 in words is "eight billion, nine hundred ninety million, six hundred forty-two thousand, seven hundred sixty-one".