381489202169 has 2 divisors, whose sum is σ = 381489202170. Its totient is φ = 381489202168.

The previous prime is 381489202111. The next prime is 381489202177. The reversal of 381489202169 is 961202984183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208129388944 + 173359813225 = 456212^2 + 416365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381489202169 is a prime.

It is a super-2 number, since 2×381489202169² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381489202169.

It is not a weakly prime, because it can be changed into another prime (381489204169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190744601084 + 190744601085.

It is an arithmetic number, because the mean of its divisors is an integer number (190744601085).

Almost surely, 2^381489202169 is an apocalyptic number.

It is an amenable number.

381489202169 is a deficient number, since it is larger than the sum of its proper divisors (1).

381489202169 is an equidigital number, since it uses as much as digits as its factorization.

381489202169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 381489202169 in words is "three hundred eighty-one billion, four hundred eighty-nine million, two hundred two thousand, one hundred sixty-nine".