997481179 has 2 divisors, whose sum is σ = 997481180. Its totient is φ = 997481178.

The previous prime is 997481153. The next prime is 997481197. The reversal of 997481179 is 971184799.

Together with next prime (997481197) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997481179 - 2⁹ = 997480667 is a prime.

It is not a weakly prime, because it can be changed into another prime (997481119) 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, 498740589 + 498740590.

It is an arithmetic number, because the mean of its divisors is an integer number (498740590).

Almost surely, 2^997481179 is an apocalyptic number.

997481179 is a deficient number, since it is larger than the sum of its proper divisors (1).

997481179 is an equidigital number, since it uses as much as digits as its factorization.

997481179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 55.

The square root of 997481179 is about 31582.9254344812. The cubic root of 997481179 is about 999.1596870720.

The spelling of 997481179 in words is "nine hundred ninety-seven million, four hundred eighty-one thousand, one hundred seventy-nine".