27561007 has 4 divisors (see below), whose sum is σ = 28081080. Its totient is φ = 27040936.

The previous prime is 27560999. The next prime is 27561011. The reversal of 27561007 is 70016572.

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 27561007 - 2³ = 27560999 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 (27561047) 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, 259957 + ... + 260062.

It is an arithmetic number, because the mean of its divisors is an integer number (7020270).

Almost surely, 2^27561007 is an apocalyptic number.

27561007 is a deficient number, since it is larger than the sum of its proper divisors (520073).

27561007 is an equidigital number, since it uses as much as digits as its factorization.

27561007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520072.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 27561007 is about 5249.8578075982. The cubic root of 27561007 is about 302.0635766622.

Adding to 27561007 its reverse (70016572), we get a palindrome (97577579).

The spelling of 27561007 in words is "twenty-seven million, five hundred sixty-one thousand, seven".