27922839493 has 4 divisors (see below), whose sum is σ = 27923173740. Its totient is φ = 27922505248.

The previous prime is 27922839491. The next prime is 27922839563. The reversal of 27922839493 is 39493822972.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6165704484 + 21757135009 = 78522^2 + 147503^2 .

It is a cyclic number.

It is not a de Polignac number, because 27922839493 - 2¹ = 27922839491 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27922839491) 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, 79521 + ... + 249337.

It is an arithmetic number, because the mean of its divisors is an integer number (6980793435).

Almost surely, 2^27922839493 is an apocalyptic number.

It is an amenable number.

27922839493 is a deficient number, since it is larger than the sum of its proper divisors (334247).

27922839493 is a wasteful number, since it uses less digits than its factorization.

27922839493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334246.

The product of its digits is 11757312, while the sum is 58.

The spelling of 27922839493 in words is "twenty-seven billion, nine hundred twenty-two million, eight hundred thirty-nine thousand, four hundred ninety-three".