27831505973 has 2 divisors, whose sum is σ = 27831505974. Its totient is φ = 27831505972.

The previous prime is 27831505951. The next prime is 27831505991. The reversal of 27831505973 is 37950513872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27829913329 + 1592644 = 166823^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 27831505973 - 2²⁶ = 27764397109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27831505913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13915752986 + 13915752987.

It is an arithmetic number, because the mean of its divisors is an integer number (13915752987).

Almost surely, 2^27831505973 is an apocalyptic number.

It is an amenable number.

27831505973 is a deficient number, since it is larger than the sum of its proper divisors (1).

27831505973 is an equidigital number, since it uses as much as digits as its factorization.

27831505973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 27831505973 in words is "twenty-seven billion, eight hundred thirty-one million, five hundred five thousand, nine hundred seventy-three".