27213967 has 4 divisors (see below), whose sum is σ = 29687976. Its totient is φ = 24739960.

The previous prime is 27213959. The next prime is 27213971. The reversal of 27213967 is 76931272.

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

It is a cyclic number.

It is not a de Polignac number, because 27213967 - 2³ = 27213959 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 (27213917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236988 + ... + 1237009.

It is an arithmetic number, because the mean of its divisors is an integer number (7421994).

Almost surely, 2^27213967 is an apocalyptic number.

27213967 is a deficient number, since it is larger than the sum of its proper divisors (2474009).

27213967 is a wasteful number, since it uses less digits than its factorization.

27213967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474008.

The product of its digits is 31752, while the sum is 37.

The square root of 27213967 is about 5216.7007773113. The cubic root of 27213967 is about 300.7903861739.

The spelling of 27213967 in words is "twenty-seven million, two hundred thirteen thousand, nine hundred sixty-seven".