997802207 has 2 divisors, whose sum is σ = 997802208. Its totient is φ = 997802206.

The previous prime is 997802203. The next prime is 997802209. The reversal of 997802207 is 702208799.

It is a strong prime.

It is an emirp because it is prime and its reverse (702208799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997802207 - 2² = 997802203 is a prime.

Together with 997802209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997802203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498901103 + 498901104.

It is an arithmetic number, because the mean of its divisors is an integer number (498901104).

Almost surely, 2^997802207 is an apocalyptic number.

997802207 is a deficient number, since it is larger than the sum of its proper divisors (1).

997802207 is an equidigital number, since it uses as much as digits as its factorization.

997802207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 997802207 is about 31588.0073287316. The cubic root of 997802207 is about 999.2668649777.

The spelling of 997802207 in words is "nine hundred ninety-seven million, eight hundred two thousand, two hundred seven".