992947861709 has 2 divisors, whose sum is σ = 992947861710. Its totient is φ = 992947861708.

The previous prime is 992947861669. The next prime is 992947861817. The reversal of 992947861709 is 907168749299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626828475625 + 366119386084 = 791725^2 + 605078^2 .

It is an emirp because it is prime and its reverse (907168749299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 992947861709 - 2²⁴ = 992931084493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992947861109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496473930854 + 496473930855.

It is an arithmetic number, because the mean of its divisors is an integer number (496473930855).

Almost surely, 2^992947861709 is an apocalyptic number.

It is an amenable number.

992947861709 is a deficient number, since it is larger than the sum of its proper divisors (1).

992947861709 is an equidigital number, since it uses as much as digits as its factorization.

992947861709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123451776, while the sum is 71.

The spelling of 992947861709 in words is "nine hundred ninety-two billion, nine hundred forty-seven million, eight hundred sixty-one thousand, seven hundred nine".