389631071 has 2 divisors, whose sum is σ = 389631072. Its totient is φ = 389631070.

The previous prime is 389631061. The next prime is 389631079. The reversal of 389631071 is 170136983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389631071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389631079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194815535 + 194815536.

It is an arithmetic number, because the mean of its divisors is an integer number (194815536).

Almost surely, 2^389631071 is an apocalyptic number.

389631071 is a deficient number, since it is larger than the sum of its proper divisors (1).

389631071 is an equidigital number, since it uses as much as digits as its factorization.

389631071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 389631071 is about 19739.0747250219. The cubic root of 389631071 is about 730.3839045320.

The spelling of 389631071 in words is "three hundred eighty-nine million, six hundred thirty-one thousand, seventy-one".