27693961 has 4 divisors (see below), whose sum is σ = 27825424. Its totient is φ = 27562500.

The previous prime is 27693949. The next prime is 27693971. The reversal of 27693961 is 16939672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 6-Lehmer number, since φ(27693961) divides (27693961-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 27693961 - 2⁵ = 27693929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27693971) 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, 65415 + ... + 65836.

It is an arithmetic number, because the mean of its divisors is an integer number (6956356).

Almost surely, 2^27693961 is an apocalyptic number.

It is an amenable number.

27693961 is a deficient number, since it is larger than the sum of its proper divisors (131463).

27693961 is a wasteful number, since it uses less digits than its factorization.

27693961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131462.

The product of its digits is 122472, while the sum is 43.

The square root of 27693961 is about 5262.5052018977. The cubic root of 27693961 is about 302.5485148607.

The spelling of 27693961 in words is "twenty-seven million, six hundred ninety-three thousand, nine hundred sixty-one".