997308017 has 4 divisors (see below), whose sum is σ = 997584240. Its totient is φ = 997031796.

The previous prime is 997307977. The next prime is 997308031. The reversal of 997308017 is 710803799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 997308017 - 2¹² = 997303921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997308217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132623 + ... + 139940.

It is an arithmetic number, because the mean of its divisors is an integer number (249396060).

Almost surely, 2^997308017 is an apocalyptic number.

It is an amenable number.

997308017 is a deficient number, since it is larger than the sum of its proper divisors (276223).

997308017 is a wasteful number, since it uses less digits than its factorization.

997308017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276222.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 997308017 is about 31580.1839291667. The cubic root of 997308017 is about 999.1018659300.

The spelling of 997308017 in words is "nine hundred ninety-seven million, three hundred eight thousand, seventeen".