31727279349 has 24 divisors (see below), whose sum is σ = 46439644160. Its totient is φ = 20869718688.

The previous prime is 31727279347. The next prime is 31727279387. The reversal of 31727279349 is 94397272713.

31727279349 is a `hidden beast` number, since 3 + 1 + 7 + 27 + 279 + 349 = 666.

It is not a de Polignac number, because 31727279349 - 2¹ = 31727279347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31727279295 and 31727279304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31727279347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1099899 + ... + 1128375.

Almost surely, 2^31727279349 is an apocalyptic number.

It is an amenable number.

31727279349 is a deficient number, since it is larger than the sum of its proper divisors (14712364811).

31727279349 is a wasteful number, since it uses less digits than its factorization.

31727279349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30129 (or 30126 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The spelling of 31727279349 in words is "thirty-one billion, seven hundred twenty-seven million, two hundred seventy-nine thousand, three hundred forty-nine".