997310771 has 4 divisors (see below), whose sum is σ = 1008516600. Its totient is φ = 986104944.

The previous prime is 997310761. The next prime is 997310791. The reversal of 997310771 is 177013799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997310771 - 2¹⁸ = 997048627 is a prime.

It is a super-2 number, since 2×997310771² = 1989257547905228882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997310711) 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, 5602781 + ... + 5602958.

It is an arithmetic number, because the mean of its divisors is an integer number (252129150).

Almost surely, 2^997310771 is an apocalyptic number.

997310771 is a deficient number, since it is larger than the sum of its proper divisors (11205829).

997310771 is a wasteful number, since it uses less digits than its factorization.

997310771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205828.

The product of its (nonzero) digits is 83349, while the sum is 44.

The square root of 997310771 is about 31580.2275324292. The cubic root of 997310771 is about 999.1027855804.

The spelling of 997310771 in words is "nine hundred ninety-seven million, three hundred ten thousand, seven hundred seventy-one".