381836403989 has 2 divisors, whose sum is σ = 381836403990. Its totient is φ = 381836403988.

The previous prime is 381836403937. The next prime is 381836404013. The reversal of 381836403989 is 989304638183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204946344100 + 176890059889 = 452710^2 + 420583^2 .

It is a cyclic number.

It is not a de Polignac number, because 381836403989 - 2²⁸ = 381567968533 is a prime.

It is a super-2 number, since 2×381836403989² (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 (381836400989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190918201994 + 190918201995.

It is an arithmetic number, because the mean of its divisors is an integer number (190918201995).

Almost surely, 2^381836403989 is an apocalyptic number.

It is an amenable number.

381836403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

381836403989 is an equidigital number, since it uses as much as digits as its factorization.

381836403989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26873856, while the sum is 62.

The spelling of 381836403989 in words is "three hundred eighty-one billion, eight hundred thirty-six million, four hundred three thousand, nine hundred eighty-nine".