27776797 has 4 divisors (see below), whose sum is σ = 28031740. Its totient is φ = 27521856.

The previous prime is 27776789. The next prime is 27776807. The reversal of 27776797 is 79767772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20985561 + 6791236 = 4581^2 + 2606^2 .

It is a cyclic number.

It is not a de Polignac number, because 27776797 - 2³ = 27776789 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 (27776737) 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, 127308 + ... + 127525.

It is an arithmetic number, because the mean of its divisors is an integer number (7007935).

Almost surely, 2^27776797 is an apocalyptic number.

It is an amenable number.

27776797 is a deficient number, since it is larger than the sum of its proper divisors (254943).

27776797 is a wasteful number, since it uses less digits than its factorization.

27776797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254942.

The product of its digits is 1815156, while the sum is 52.

The square root of 27776797 is about 5270.3697213763. The cubic root of 27776797 is about 302.8498677137.

The spelling of 27776797 in words is "twenty-seven million, seven hundred seventy-six thousand, seven hundred ninety-seven".