997670767 has 2 divisors, whose sum is σ = 997670768. Its totient is φ = 997670766.

The previous prime is 997670761. The next prime is 997670777. The reversal of 997670767 is 767076799.

It is a weak prime.

It is an emirp because it is prime and its reverse (767076799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997670767 - 2¹¹ = 997668719 is a prime.

It is a super-3 number, since 3×997670767³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997670761) 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, 498835383 + 498835384.

It is an arithmetic number, because the mean of its divisors is an integer number (498835384).

Almost surely, 2^997670767 is an apocalyptic number.

997670767 is a deficient number, since it is larger than the sum of its proper divisors (1).

997670767 is an equidigital number, since it uses as much as digits as its factorization.

997670767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7001316, while the sum is 58.

The square root of 997670767 is about 31585.9267237800. The cubic root of 997670767 is about 999.2229854047. Note that the first 3 decimals are identical.

The spelling of 997670767 in words is "nine hundred ninety-seven million, six hundred seventy thousand, seven hundred sixty-seven".