27775997 has 8 divisors (see below), whose sum is σ = 28928640. Its totient is φ = 26636400.

The previous prime is 27775991. The next prime is 27775999. The reversal of 27775997 is 79957772.

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

It is not a de Polignac number, because 27775997 - 2¹⁰ = 27774973 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 (27775991) 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, 1208 + ... + 7550.

It is an arithmetic number, because the mean of its divisors is an integer number (3616080).

Almost surely, 2^27775997 is an apocalyptic number.

It is an amenable number.

27775997 is a deficient number, since it is larger than the sum of its proper divisors (1152643).

27775997 is a wasteful number, since it uses less digits than its factorization.

27775997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523.

The product of its digits is 1944810, while the sum is 53.

The square root of 27775997 is about 5270.2938248261. The cubic root of 27775997 is about 302.8469602244.

The spelling of 27775997 in words is "twenty-seven million, seven hundred seventy-five thousand, nine hundred ninety-seven".