997702847 has 2 divisors, whose sum is σ = 997702848. Its totient is φ = 997702846.

The previous prime is 997702843. The next prime is 997702859. The reversal of 997702847 is 748207799.

It is a weak prime.

It is an emirp because it is prime and its reverse (748207799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997702847 - 2² = 997702843 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997702841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498851423 + 498851424.

It is an arithmetic number, because the mean of its divisors is an integer number (498851424).

Almost surely, 2^997702847 is an apocalyptic number.

997702847 is a deficient number, since it is larger than the sum of its proper divisors (1).

997702847 is an equidigital number, since it uses as much as digits as its factorization.

997702847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 997702847 is about 31586.4345407961. The cubic root of 997702847 is about 999.2336952604.

The spelling of 997702847 in words is "nine hundred ninety-seven million, seven hundred two thousand, eight hundred forty-seven".