27621023 has 4 divisors (see below), whose sum is σ = 27695448. Its totient is φ = 27546600.

The previous prime is 27621019. The next prime is 27621043. The reversal of 27621023 is 32012672.

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 27621023 - 2² = 27621019 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 27621023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27621043) 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, 36653 + ... + 37398.

It is an arithmetic number, because the mean of its divisors is an integer number (6923862).

Almost surely, 2^27621023 is an apocalyptic number.

27621023 is a deficient number, since it is larger than the sum of its proper divisors (74425).

27621023 is an equidigital number, since it uses as much as digits as its factorization.

27621023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74424.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 27621023 is about 5255.5706635912. The cubic root of 27621023 is about 302.2826724874.

Adding to 27621023 its reverse (32012672), we get a palindrome (59633695).

It can be divided in two parts, 276210 and 23, that multiplied together give a triangular number (6352830 = T₃₅₆₄).

The spelling of 27621023 in words is "twenty-seven million, six hundred twenty-one thousand, twenty-three".