27493383397 has 4 divisors (see below), whose sum is σ = 27493715116. Its totient is φ = 27493051680.

The previous prime is 27493383377. The next prime is 27493383409. The reversal of 27493383397 is 79338339472.

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 1678213156 + 25815170241 = 40966^2 + 160671^2 .

It is a cyclic number.

It is not a de Polignac number, because 27493383397 - 2³¹ = 25345899749 is a prime.

It is a super-2 number, since 2×27493383397² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27493383377) 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, 76963 + ... + 246799.

It is an arithmetic number, because the mean of its divisors is an integer number (6873428779).

Almost surely, 2^27493383397 is an apocalyptic number.

It is an amenable number.

27493383397 is a deficient number, since it is larger than the sum of its proper divisors (331719).

27493383397 is a wasteful number, since it uses less digits than its factorization.

27493383397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331718.

The product of its digits is 20575296, while the sum is 58.

The spelling of 27493383397 in words is "twenty-seven billion, four hundred ninety-three million, three hundred eighty-three thousand, three hundred ninety-seven".