997353179 has 2 divisors, whose sum is σ = 997353180. Its totient is φ = 997353178.

The previous prime is 997353143. The next prime is 997353199. The reversal of 997353179 is 971353799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997353179 is a prime.

It is a super-2 number, since 2×997353179² = 1989426727322812082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 997353179.

It is not a weakly prime, because it can be changed into another prime (997353199) 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, 498676589 + 498676590.

It is an arithmetic number, because the mean of its divisors is an integer number (498676590).

Almost surely, 2^997353179 is an apocalyptic number.

997353179 is a deficient number, since it is larger than the sum of its proper divisors (1).

997353179 is an equidigital number, since it uses as much as digits as its factorization.

997353179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1607445, while the sum is 53.

The square root of 997353179 is about 31580.8989580727. The cubic root of 997353179 is about 999.1169467799.

The spelling of 997353179 in words is "nine hundred ninety-seven million, three hundred fifty-three thousand, one hundred seventy-nine".