997907112 has 96 divisors (see below), whose sum is σ = 2831911680. Its totient is φ = 317053440.

The previous prime is 997907107. The next prime is 997907129. The reversal of 997907112 is 211709799.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146208 + ... + 152880.

It is an arithmetic number, because the mean of its divisors is an integer number (29499080).

Almost surely, 2^997907112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997907112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1415955840).

997907112 is an abundant number, since it is smaller than the sum of its proper divisors (1834004568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997907112 is a wasteful number, since it uses less digits than its factorization.

997907112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6783 (or 6776 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 45.

The square root of 997907112 is about 31589.6678045211. The cubic root of 997907112 is about 999.3018834133.

The spelling of 997907112 in words is "nine hundred ninety-seven million, nine hundred seven thousand, one hundred twelve".