992400217 has 2 divisors, whose sum is σ = 992400218. Its totient is φ = 992400216.

The previous prime is 992400209. The next prime is 992400223. The reversal of 992400217 is 712004299.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930006016 + 62394201 = 30496^2 + 7899^2 .

It is a cyclic number.

It is not a de Polignac number, because 992400217 - 2³ = 992400209 is a prime.

It is not a weakly prime, because it can be changed into another prime (992400247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496200108 + 496200109.

It is an arithmetic number, because the mean of its divisors is an integer number (496200109).

Almost surely, 2^992400217 is an apocalyptic number.

It is an amenable number.

992400217 is a deficient number, since it is larger than the sum of its proper divisors (1).

992400217 is an equidigital number, since it uses as much as digits as its factorization.

992400217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 992400217 is about 31502.3843065886. The cubic root of 992400217 is about 997.4602943557.

The spelling of 992400217 in words is "nine hundred ninety-two million, four hundred thousand, two hundred seventeen".