997727799 has 8 divisors (see below), whose sum is σ = 1330456320. Its totient is φ = 665075576.

The previous prime is 997727789. The next prime is 997727821.

997727799 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 997727799 - 2⁵ = 997727767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997727729) 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, 28132 + ... + 52790.

It is an arithmetic number, because the mean of its divisors is an integer number (166307040).

Almost surely, 2^997727799 is an apocalyptic number.

997727799 is a deficient number, since it is larger than the sum of its proper divisors (332728521).

997727799 is a wasteful number, since it uses less digits than its factorization.

997727799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38149.

The product of its digits is 31505922, while the sum is 66.

The square root of 997727799 is about 31586.8295180127. The cubic root of 997727799 is about 999.2420252862.

The spelling of 997727799 in words is "nine hundred ninety-seven million, seven hundred twenty-seven thousand, seven hundred ninety-nine".