27972325391 has 2 divisors, whose sum is σ = 27972325392. Its totient is φ = 27972325390.

The previous prime is 27972325379. The next prime is 27972325393. The reversal of 27972325391 is 19352327972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27972325391 - 2⁶ = 27972325327 is a prime.

Together with 27972325393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27972325393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13986162695 + 13986162696.

It is an arithmetic number, because the mean of its divisors is an integer number (13986162696).

Almost surely, 2^27972325391 is an apocalyptic number.

27972325391 is a deficient number, since it is larger than the sum of its proper divisors (1).

27972325391 is an equidigital number, since it uses as much as digits as its factorization.

27972325391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 50.

The spelling of 27972325391 in words is "twenty-seven billion, nine hundred seventy-two million, three hundred twenty-five thousand, three hundred ninety-one".