997303799 has 4 divisors (see below), whose sum is σ = 998931336. Its totient is φ = 995676264.

The previous prime is 997303789. The next prime is 997303831.

It is a happy number.

997303799 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997303799 is a prime.

It is a super-2 number, since 2×997303799² = 1989229734999664802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997303709) 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, 812849 + ... + 814074.

It is an arithmetic number, because the mean of its divisors is an integer number (249732834).

Almost surely, 2^997303799 is an apocalyptic number.

997303799 is a deficient number, since it is larger than the sum of its proper divisors (1627537).

997303799 is a wasteful number, since it uses less digits than its factorization.

997303799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627536.

The product of its (nonzero) digits is 2893401, while the sum is 56.

The square root of 997303799 is about 31580.1171467112. The cubic root of 997303799 is about 999.1004573991.

The spelling of 997303799 in words is "nine hundred ninety-seven million, three hundred three thousand, seven hundred ninety-nine".