992720647 has 2 divisors, whose sum is σ = 992720648. Its totient is φ = 992720646.

The previous prime is 992720629. The next prime is 992720653. The reversal of 992720647 is 746027299.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (746027299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 992720647 - 2¹¹ = 992718599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 992720597 and 992720606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992720147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496360323 + 496360324.

It is an arithmetic number, because the mean of its divisors is an integer number (496360324).

Almost surely, 2^992720647 is an apocalyptic number.

992720647 is a deficient number, since it is larger than the sum of its proper divisors (1).

992720647 is an equidigital number, since it uses as much as digits as its factorization.

992720647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 992720647 is about 31507.4697016438. The cubic root of 992720647 is about 997.5676374092.

The spelling of 992720647 in words is "nine hundred ninety-two million, seven hundred twenty thousand, six hundred forty-seven".