381364939 has 2 divisors, whose sum is σ = 381364940. Its totient is φ = 381364938.

The previous prime is 381364901. The next prime is 381364981. The reversal of 381364939 is 939463183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381364939 is a prime.

It is not a weakly prime, because it can be changed into another prime (381365939) 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, 190682469 + 190682470.

It is an arithmetic number, because the mean of its divisors is an integer number (190682470).

Almost surely, 2^381364939 is an apocalyptic number.

381364939 is a deficient number, since it is larger than the sum of its proper divisors (1).

381364939 is an equidigital number, since it uses as much as digits as its factorization.

381364939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 381364939 is about 19528.5672541536. The cubic root of 381364939 is about 725.1818419813.

The spelling of 381364939 in words is "three hundred eighty-one million, three hundred sixty-four thousand, nine hundred thirty-nine".