27938531207 has 4 divisors (see below), whose sum is σ = 28185774960. Its totient is φ = 27691287456.

The previous prime is 27938531189. The next prime is 27938531219. The reversal of 27938531207 is 70213583972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27938531207 - 2¹⁶ = 27938465671 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 (27938531237) 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, 123621707 + ... + 123621932.

It is an arithmetic number, because the mean of its divisors is an integer number (7046443740).

Almost surely, 2^27938531207 is an apocalyptic number.

27938531207 is a deficient number, since it is larger than the sum of its proper divisors (247243753).

27938531207 is a wasteful number, since it uses less digits than its factorization.

27938531207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247243752.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 27938531207 in words is "twenty-seven billion, nine hundred thirty-eight million, five hundred thirty-one thousand, two hundred seven".