997646799 has 8 divisors (see below), whose sum is σ = 1366147120. Its totient is φ = 647122176.

The previous prime is 997646789. The next prime is 997646821.

997646799 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 997646799 - 2¹⁵ = 997614031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997646759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4493794 + ... + 4494015.

It is an arithmetic number, because the mean of its divisors is an integer number (170768390).

Almost surely, 2^997646799 is an apocalyptic number.

997646799 is a deficient number, since it is larger than the sum of its proper divisors (368500321).

997646799 is a wasteful number, since it uses less digits than its factorization.

997646799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987849.

The product of its digits is 46294416, while the sum is 66.

The square root of 997646799 is about 31585.5473120223. The cubic root of 997646799 is about 999.2149835771.

The spelling of 997646799 in words is "nine hundred ninety-seven million, six hundred forty-six thousand, seven hundred ninety-nine".