27661923 has 6 divisors (see below), whose sum is σ = 39956124. Its totient is φ = 18441276.

The previous prime is 27661913. The next prime is 27661979. The reversal of 27661923 is 32916672.

It is not a de Polignac number, because 27661923 - 2⁶ = 27661859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27661913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1536765 + ... + 1536782.

It is an arithmetic number, because the mean of its divisors is an integer number (6659354).

Almost surely, 2^27661923 is an apocalyptic number.

27661923 is a deficient number, since it is larger than the sum of its proper divisors (12294201).

27661923 is a wasteful number, since it uses less digits than its factorization.

27661923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073553 (or 3073550 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 27661923 is about 5259.4603335323. The cubic root of 27661923 is about 302.4318012138.

The spelling of 27661923 in words is "twenty-seven million, six hundred sixty-one thousand, nine hundred twenty-three".