27421973 has 4 divisors (see below), whose sum is σ = 27432768. Its totient is φ = 27411180.

The previous prime is 27421963. The next prime is 27421991. The reversal of 27421973 is 37912472.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27421973 - 2⁸ = 27421717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27421903) 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, 740 + ... + 7442.

It is an arithmetic number, because the mean of its divisors is an integer number (6858192).

Almost surely, 2^27421973 is an apocalyptic number.

It is an amenable number.

27421973 is a deficient number, since it is larger than the sum of its proper divisors (10795).

27421973 is an equidigital number, since it uses as much as digits as its factorization.

27421973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10794.

The product of its digits is 21168, while the sum is 35.

The square root of 27421973 is about 5236.5993736393. The cubic root of 27421973 is about 301.5547911244.

The spelling of 27421973 in words is "twenty-seven million, four hundred twenty-one thousand, nine hundred seventy-three".