997297148 has 6 divisors (see below), whose sum is σ = 1745270016. Its totient is φ = 498648572.

The previous prime is 997297139. The next prime is 997297159. The reversal of 997297148 is 841792799.

It is a junction number, because it is equal to n+sod(n) for n = 997297093 and 997297102.

It is a congruent number.

It is an unprimeable number.

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, 124662140 + ... + 124662147.

It is an arithmetic number, because the mean of its divisors is an integer number (290878336).

Almost surely, 2^997297148 is an apocalyptic number.

It is an amenable number.

997297148 is a deficient number, since it is larger than the sum of its proper divisors (747972868).

997297148 is a wasteful number, since it uses less digits than its factorization.

997297148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249324291 (or 249324289 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 56.

The square root of 997297148 is about 31580.0118429363. The cubic root of 997297148 is about 999.0982364002.

The spelling of 997297148 in words is "nine hundred ninety-seven million, two hundred ninety-seven thousand, one hundred forty-eight".