27797946999 has 4 divisors (see below), whose sum is σ = 37063929336. Its totient is φ = 18531964664.

The previous prime is 27797946961. The next prime is 27797947027. The reversal of 27797946999 is 99964979772.

It is a happy number.

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-27797946999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27797946949) 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, 4632991164 + ... + 4632991169.

It is an arithmetic number, because the mean of its divisors is an integer number (9265982334).

Almost surely, 2^27797946999 is an apocalyptic number.

27797946999 is a deficient number, since it is larger than the sum of its proper divisors (9265982337).

27797946999 is an equidigital number, since it uses as much as digits as its factorization.

27797946999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265982336.

The product of its digits is 972182736, while the sum is 78.

The spelling of 27797946999 in words is "twenty-seven billion, seven hundred ninety-seven million, nine hundred forty-six thousand, nine hundred ninety-nine".