997670799 has 36 divisors (see below), whose sum is σ = 1513926336. Its totient is φ = 633106800.

The previous prime is 997670777. The next prime is 997670801. The reversal of 997670799 is 997076799.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 997670799 - 2⁵ = 997670767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997670099) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16355229 + ... + 16355289.

Almost surely, 2^997670799 is an apocalyptic number.

997670799 is a deficient number, since it is larger than the sum of its proper divisors (516255537).

997670799 is an frugal number, since it uses more digits than its factorization.

997670799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 13502538, while the sum is 63.

The square root of 997670799 is about 31585.9272303347. The cubic root of 997670799 is about 999.2229960880. Note that the first 3 decimals are identical.

The spelling of 997670799 in words is "nine hundred ninety-seven million, six hundred seventy thousand, seven hundred ninety-nine".