389640272873 has 2 divisors, whose sum is σ = 389640272874. Its totient is φ = 389640272872.

The previous prime is 389640272863. The next prime is 389640272881. The reversal of 389640272873 is 378272046983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297763388329 + 91876884544 = 545677^2 + 303112^2 .

It is a cyclic number.

It is not a de Polignac number, because 389640272873 - 2⁶ = 389640272809 is a prime.

It is not a weakly prime, because it can be changed into another prime (389640272863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194820136436 + 194820136437.

It is an arithmetic number, because the mean of its divisors is an integer number (194820136437).

Almost surely, 2^389640272873 is an apocalyptic number.

It is an amenable number.

389640272873 is a deficient number, since it is larger than the sum of its proper divisors (1).

389640272873 is an equidigital number, since it uses as much as digits as its factorization.

389640272873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 59.

The spelling of 389640272873 in words is "three hundred eighty-nine billion, six hundred forty million, two hundred seventy-two thousand, eight hundred seventy-three".