997160521 has 8 divisors (see below), whose sum is σ = 1141123520. Its totient is φ = 853575408.

The previous prime is 997160519. The next prime is 997160579. The reversal of 997160521 is 125061799.

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

It is not a de Polignac number, because 997160521 - 2¹ = 997160519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997160321) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 88791 + ... + 99388.

It is an arithmetic number, because the mean of its divisors is an integer number (142640440).

Almost surely, 2^997160521 is an apocalyptic number.

It is an amenable number.

997160521 is a deficient number, since it is larger than the sum of its proper divisors (143962999).

997160521 is a wasteful number, since it uses less digits than its factorization.

997160521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188943.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 997160521 is about 31577.8485809277. The cubic root of 997160521 is about 999.0526097351.

The spelling of 997160521 in words is "nine hundred ninety-seven million, one hundred sixty thousand, five hundred twenty-one".