992861 has 2 divisors, whose sum is σ = 992862. Its totient is φ = 992860.

The previous prime is 992857. The next prime is 992863. The reversal of 992861 is 168299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511225 + 481636 = 715^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 992861 - 2² = 992857 is a prime.

Together with 992863, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496430 + 496431.

It is an arithmetic number, because the mean of its divisors is an integer number (496431).

2⁹⁹²⁸⁶¹ is an apocalyptic number.

It is an amenable number.

992861 is a deficient number, since it is larger than the sum of its proper divisors (1).

992861 is an equidigital number, since it uses as much as digits as its factorization.

992861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 992861 is about 996.4241064928. The cubic root of 992861 is about 99.7614647953.

The spelling of 992861 in words is "nine hundred ninety-two thousand, eight hundred sixty-one".