27434502989 has 4 divisors (see below), whose sum is σ = 27437821824. Its totient is φ = 27431184156.

The previous prime is 27434502937. The next prime is 27434503013. The reversal of 27434502989 is 98920543472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27434502989 - 2¹² = 27434498893 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 27434502989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27434502929) 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, 1646987 + ... + 1663560.

It is an arithmetic number, because the mean of its divisors is an integer number (6859455456).

Almost surely, 2^27434502989 is an apocalyptic number.

It is an amenable number.

27434502989 is a deficient number, since it is larger than the sum of its proper divisors (3318835).

27434502989 is an equidigital number, since it uses as much as digits as its factorization.

27434502989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318834.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 27434502989 in words is "twenty-seven billion, four hundred thirty-four million, five hundred two thousand, nine hundred eighty-nine".