381381401 has 2 divisors, whose sum is σ = 381381402. Its totient is φ = 381381400.

The previous prime is 381381373. The next prime is 381381461. The reversal of 381381401 is 104183183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228735376 + 152646025 = 15124^2 + 12355^2 .

It is a cyclic number.

It is not a de Polignac number, because 381381401 - 2¹⁸ = 381119257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381381461) 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, 190690700 + 190690701.

It is an arithmetic number, because the mean of its divisors is an integer number (190690701).

Almost surely, 2^381381401 is an apocalyptic number.

It is an amenable number.

381381401 is a deficient number, since it is larger than the sum of its proper divisors (1).

381381401 is an equidigital number, since it uses as much as digits as its factorization.

381381401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 381381401 is about 19528.9887346990. The cubic root of 381381401 is about 725.1922762317.

The spelling of 381381401 in words is "three hundred eighty-one million, three hundred eighty-one thousand, four hundred one".