997608797 has 2 divisors, whose sum is σ = 997608798. Its totient is φ = 997608796.

The previous prime is 997608769. The next prime is 997608809. The reversal of 997608797 is 797806799.

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., 537034276 + 460574521 = 23174^2 + 21461^2 .

It is a cyclic number.

It is not a de Polignac number, because 997608797 - 2¹² = 997604701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997608767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498804398 + 498804399.

It is an arithmetic number, because the mean of its divisors is an integer number (498804399).

Almost surely, 2^997608797 is an apocalyptic number.

It is an amenable number.

997608797 is a deficient number, since it is larger than the sum of its proper divisors (1).

997608797 is an equidigital number, since it uses as much as digits as its factorization.

997608797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12002256, while the sum is 62.

The square root of 997608797 is about 31584.9457336877. The cubic root of 997608797 is about 999.2022961711.

The spelling of 997608797 in words is "nine hundred ninety-seven million, six hundred eight thousand, seven hundred ninety-seven".