381164279 has 2 divisors, whose sum is σ = 381164280. Its totient is φ = 381164278.

The previous prime is 381164261. The next prime is 381164291. The reversal of 381164279 is 972461183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381164279 - 2¹² = 381160183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381164209) 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, 190582139 + 190582140.

It is an arithmetic number, because the mean of its divisors is an integer number (190582140).

Almost surely, 2^381164279 is an apocalyptic number.

381164279 is a deficient number, since it is larger than the sum of its proper divisors (1).

381164279 is an equidigital number, since it uses as much as digits as its factorization.

381164279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 381164279 is about 19523.4289764887. The cubic root of 381164279 is about 725.0546317928.

The spelling of 381164279 in words is "three hundred eighty-one million, one hundred sixty-four thousand, two hundred seventy-nine".