27972370949 has 4 divisors (see below), whose sum is σ = 27986172864. Its totient is φ = 27958569036.

The previous prime is 27972370939. The next prime is 27972370973. The reversal of 27972370949 is 94907327972.

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 27972370949 - 2¹² = 27972366853 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 (27972370939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6897917 + ... + 6901970.

It is an arithmetic number, because the mean of its divisors is an integer number (6996543216).

Almost surely, 2^27972370949 is an apocalyptic number.

It is an amenable number.

27972370949 is a deficient number, since it is larger than the sum of its proper divisors (13801915).

27972370949 is a wasteful number, since it uses less digits than its factorization.

27972370949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13801914.

The product of its (nonzero) digits is 12002256, while the sum is 59.

The spelling of 27972370949 in words is "twenty-seven billion, nine hundred seventy-two million, three hundred seventy thousand, nine hundred forty-nine".