997442371 has 2 divisors, whose sum is σ = 997442372. Its totient is φ = 997442370.

The previous prime is 997442359. The next prime is 997442393. The reversal of 997442371 is 173244799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997442371 - 2⁵ = 997442339 is a prime.

It is a super-2 number, since 2×997442371² = 1989782566932203282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (997442321) 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, 498721185 + 498721186.

It is an arithmetic number, because the mean of its divisors is an integer number (498721186).

Almost surely, 2^997442371 is an apocalyptic number.

997442371 is a deficient number, since it is larger than the sum of its proper divisors (1).

997442371 is an equidigital number, since it uses as much as digits as its factorization.

997442371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 46.

The square root of 997442371 is about 31582.3110459004. The cubic root of 997442371 is about 999.1467291359.

The spelling of 997442371 in words is "nine hundred ninety-seven million, four hundred forty-two thousand, three hundred seventy-one".