3817126381 has 2 divisors, whose sum is σ = 3817126382. Its totient is φ = 3817126380.

The previous prime is 3817126367. The next prime is 3817126387. The reversal of 3817126381 is 1836217183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3728201481 + 88924900 = 61059^2 + 9430^2 .

It is a cyclic number.

It is not a de Polignac number, because 3817126381 - 2⁹ = 3817125869 is a prime.

It is a super-2 number, since 2×3817126381² = 29140907617052314322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3817126387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1908563190 + 1908563191.

It is an arithmetic number, because the mean of its divisors is an integer number (1908563191).

Almost surely, 2^3817126381 is an apocalyptic number.

It is an amenable number.

3817126381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3817126381 is an equidigital number, since it uses as much as digits as its factorization.

3817126381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 3817126381 is about 61782.8971560901. The cubic root of 3817126381 is about 1562.8315848472.

The spelling of 3817126381 in words is "three billion, eight hundred seventeen million, one hundred twenty-six thousand, three hundred eighty-one".