997276187 has 2 divisors, whose sum is σ = 997276188. Its totient is φ = 997276186.

The previous prime is 997276177. The next prime is 997276193. The reversal of 997276187 is 781672799.

It is a strong prime.

It is an emirp because it is prime and its reverse (781672799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997276187 - 2¹⁰ = 997275163 is a prime.

It is not a weakly prime, because it can be changed into another prime (997276177) 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, 498638093 + 498638094.

It is an arithmetic number, because the mean of its divisors is an integer number (498638094).

Almost surely, 2^997276187 is an apocalyptic number.

997276187 is a deficient number, since it is larger than the sum of its proper divisors (1).

997276187 is an equidigital number, since it uses as much as digits as its factorization.

997276187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 56.

The square root of 997276187 is about 31579.6799698794. The cubic root of 997276187 is about 999.0912367328.

The spelling of 997276187 in words is "nine hundred ninety-seven million, two hundred seventy-six thousand, one hundred eighty-seven".