27421967 has 4 divisors (see below), whose sum is σ = 27638016. Its totient is φ = 27205920.

The previous prime is 27421963. The next prime is 27421991. The reversal of 27421967 is 76912472.

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 27421967 - 2² = 27421963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27421967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27421963) 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, 107834 + ... + 108087.

It is an arithmetic number, because the mean of its divisors is an integer number (6909504).

Almost surely, 2^27421967 is an apocalyptic number.

27421967 is a deficient number, since it is larger than the sum of its proper divisors (216049).

27421967 is a wasteful number, since it uses less digits than its factorization.

27421967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216048.

The product of its digits is 42336, while the sum is 38.

The square root of 27421967 is about 5236.5988007484. The cubic root of 27421967 is about 301.5547691307.

The spelling of 27421967 in words is "twenty-seven million, four hundred twenty-one thousand, nine hundred sixty-seven".