389337562181 has 2 divisors, whose sum is σ = 389337562182. Its totient is φ = 389337562180.

The previous prime is 389337562171. The next prime is 389337562261. The reversal of 389337562181 is 181265733983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388565222500 + 772339681 = 623350^2 + 27791^2 .

It is a cyclic number.

It is not a de Polignac number, because 389337562181 - 2³⁸ = 114459655237 is a prime.

It is a super-2 number, since 2×389337562181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389337562171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194668781090 + 194668781091.

It is an arithmetic number, because the mean of its divisors is an integer number (194668781091).

Almost surely, 2^389337562181 is an apocalyptic number.

It is an amenable number.

389337562181 is a deficient number, since it is larger than the sum of its proper divisors (1).

389337562181 is an equidigital number, since it uses as much as digits as its factorization.

389337562181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The spelling of 389337562181 in words is "three hundred eighty-nine billion, three hundred thirty-seven million, five hundred sixty-two thousand, one hundred eighty-one".