992748661 has 4 divisors (see below), whose sum is σ = 993187692. Its totient is φ = 992309632.

The previous prime is 992748593. The next prime is 992748719. The reversal of 992748661 is 166847299.

It is a happy number.

992748661 is digitally balanced in base 2, 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 388326436 + 604422225 = 19706^2 + 24585^2 .

It is a cyclic number.

It is not a de Polignac number, because 992748661 - 2²¹ = 990651509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 992748599 and 992748608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992748161) 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, 216106 + ... + 220651.

It is an arithmetic number, because the mean of its divisors is an integer number (248296923).

Almost surely, 2^992748661 is an apocalyptic number.

It is an amenable number.

992748661 is a deficient number, since it is larger than the sum of its proper divisors (439031).

992748661 is a wasteful number, since it uses less digits than its factorization.

992748661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439030.

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

The square root of 992748661 is about 31507.9142597538. The cubic root of 992748661 is about 997.5770209140.

The spelling of 992748661 in words is "nine hundred ninety-two million, seven hundred forty-eight thousand, six hundred sixty-one".