997000442 has 8 divisors (see below), whose sum is σ = 1502207616. Its totient is φ = 496264572.

The previous prime is 997000423. The next prime is 997000457. The reversal of 997000442 is 244000799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1117268 + ... + 1118159.

It is an arithmetic number, because the mean of its divisors is an integer number (187775952).

Almost surely, 2^997000442 is an apocalyptic number.

997000442 is a deficient number, since it is larger than the sum of its proper divisors (505207174).

997000442 is a wasteful number, since it uses less digits than its factorization.

997000442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235652.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 997000442 is about 31575.3138068333. The cubic root of 997000442 is about 998.9991459587. Note that the first 3 decimals are identical.

The spelling of 997000442 in words is "nine hundred ninety-seven million, four hundred forty-two", and thus it is an aban number.