997381267 has 2 divisors, whose sum is σ = 997381268. Its totient is φ = 997381266.

The previous prime is 997381249. The next prime is 997381271. The reversal of 997381267 is 762183799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997381267 is a prime.

It is not a weakly prime, because it can be changed into another prime (997381237) 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, 498690633 + 498690634.

It is an arithmetic number, because the mean of its divisors is an integer number (498690634).

Almost surely, 2^997381267 is an apocalyptic number.

997381267 is a deficient number, since it is larger than the sum of its proper divisors (1).

997381267 is an equidigital number, since it uses as much as digits as its factorization.

997381267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 997381267 is about 31581.3436541259. The cubic root of 997381267 is about 999.1263259159.

The spelling of 997381267 in words is "nine hundred ninety-seven million, three hundred eighty-one thousand, two hundred sixty-seven".