27479645 has 4 divisors (see below), whose sum is σ = 32975580. Its totient is φ = 21983712.

The previous prime is 27479611. The next prime is 27479653. The reversal of 27479645 is 54697472.

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 5257849 + 22221796 = 2293^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 27479645 - 2¹⁰ = 27478621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27479596 and 27479605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747960 + ... + 2747969.

It is an arithmetic number, because the mean of its divisors is an integer number (8243895).

Almost surely, 2^27479645 is an apocalyptic number.

It is an amenable number.

27479645 is a deficient number, since it is larger than the sum of its proper divisors (5495935).

27479645 is an equidigital number, since it uses as much as digits as its factorization.

27479645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495934.

The product of its digits is 423360, while the sum is 44.

The square root of 27479645 is about 5242.1031084861. The cubic root of 27479645 is about 301.7660461655.

The spelling of 27479645 in words is "twenty-seven million, four hundred seventy-nine thousand, six hundred forty-five".