997958167 has 2 divisors, whose sum is σ = 997958168. Its totient is φ = 997958166.

The previous prime is 997958153. The next prime is 997958177. The reversal of 997958167 is 761859799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997958167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997958177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498979083 + 498979084.

It is an arithmetic number, because the mean of its divisors is an integer number (498979084).

Almost surely, 2^997958167 is an apocalyptic number.

997958167 is a deficient number, since it is larger than the sum of its proper divisors (1).

997958167 is an equidigital number, since it uses as much as digits as its factorization.

997958167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 61.

The square root of 997958167 is about 31590.4758906858. The cubic root of 997958167 is about 999.3189252425.

The spelling of 997958167 in words is "nine hundred ninety-seven million, nine hundred fifty-eight thousand, one hundred sixty-seven".