27709123087 has 4 divisors (see below), whose sum is σ = 28664610120. Its totient is φ = 26753636056.

The previous prime is 27709123061. The next prime is 27709123097. The reversal of 27709123087 is 78032190772.

It is a happy number.

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 27709123087 - 2²⁷ = 27574905359 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 (27709123037) 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, 477743473 + ... + 477743530.

It is an arithmetic number, because the mean of its divisors is an integer number (7166152530).

Almost surely, 2^27709123087 is an apocalyptic number.

27709123087 is a deficient number, since it is larger than the sum of its proper divisors (955487033).

27709123087 is an equidigital number, since it uses as much as digits as its factorization.

27709123087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955487032.

The product of its (nonzero) digits is 296352, while the sum is 46.

The spelling of 27709123087 in words is "twenty-seven billion, seven hundred nine million, one hundred twenty-three thousand, eighty-seven".