997750027 has 6 divisors (see below), whose sum is σ = 1021165508. Its totient is φ = 974344224.

The previous prime is 997749989. The next prime is 997750031. The reversal of 997750027 is 720057799.

It is a happy number.

It is not a de Polignac number, because 997750027 - 2¹¹ = 997747979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997754027) 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 in 5 ways as a sum of consecutive naturals, for example, 204723 + ... + 209539.

Almost surely, 2^997750027 is an apocalyptic number.

997750027 is a deficient number, since it is larger than the sum of its proper divisors (23415481).

997750027 is an frugal number, since it uses more digits than its factorization.

997750027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9677 (or 4860 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 46.

The square root of 997750027 is about 31587.1813715627. The cubic root of 997750027 is about 999.2494458093.

The spelling of 997750027 in words is "nine hundred ninety-seven million, seven hundred fifty thousand, twenty-seven".