997549512 has 16 divisors (see below), whose sum is σ = 2493873840. Its totient is φ = 332516496.

The previous prime is 997549507. The next prime is 997549513. The reversal of 997549512 is 215945799.

It is not an unprimeable number, because it can be changed into a prime (997549513) 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 3 ways as a sum of consecutive naturals, for example, 20782258 + ... + 20782305.

It is an arithmetic number, because the mean of its divisors is an integer number (155867115).

Almost surely, 2^997549512 is an apocalyptic number.

It is an amenable number.

997549512 is an abundant number, since it is smaller than the sum of its proper divisors (1496324328).

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

997549512 is a wasteful number, since it uses less digits than its factorization.

997549512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41564572 (or 41564568 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 51.

The square root of 997549512 is about 31584.0072188442. The cubic root of 997549512 is about 999.1825025467.

The spelling of 997549512 in words is "nine hundred ninety-seven million, five hundred forty-nine thousand, five hundred twelve".