938363891 has 2 divisors, whose sum is σ = 938363892. Its totient is φ = 938363890.

The previous prime is 938363879. The next prime is 938363917. The reversal of 938363891 is 198363839.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-938363891 is a prime.

It is not a weakly prime, because it can be changed into another prime (938363291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469181945 + 469181946.

It is an arithmetic number, because the mean of its divisors is an integer number (469181946).

Almost surely, 2^938363891 is an apocalyptic number.

938363891 is a deficient number, since it is larger than the sum of its proper divisors (1).

938363891 is an equidigital number, since it uses as much as digits as its factorization.

938363891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 938363891 is about 30632.7258173346. The cubic root of 938363891 is about 979.0174419036.

The spelling of 938363891 in words is "nine hundred thirty-eight million, three hundred sixty-three thousand, eight hundred ninety-one".