381399101 has 4 divisors (see below), whose sum is σ = 381476604. Its totient is φ = 381321600.

The previous prime is 381399089. The next prime is 381399113. The reversal of 381399101 is 101993183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101993183 = 17 ⋅5999599.

It is an interprime number because it is at equal distance from previous prime (381399089) and next prime (381399113).

It can be written as a sum of positive squares in 2 ways, for example, as 65626201 + 315772900 = 8101^2 + 17770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381399101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381399701) 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 in 3 ways as a sum of consecutive naturals, for example, 30830 + ... + 41391.

It is an arithmetic number, because the mean of its divisors is an integer number (95369151).

Almost surely, 2^381399101 is an apocalyptic number.

It is an amenable number.

381399101 is a deficient number, since it is larger than the sum of its proper divisors (77503).

381399101 is an equidigital number, since it uses as much as digits as its factorization.

381399101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77502.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 381399101 is about 19529.4419019080. The cubic root of 381399101 is about 725.2034948392.

The spelling of 381399101 in words is "three hundred eighty-one million, three hundred ninety-nine thousand, one hundred one".