381018413 has 2 divisors, whose sum is σ = 381018414. Its totient is φ = 381018412.

The previous prime is 381018409. The next prime is 381018493. The reversal of 381018413 is 314810183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205005124 + 176013289 = 14318^2 + 13267^2 .

It is a cyclic number.

It is not a de Polignac number, because 381018413 - 2² = 381018409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381018493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190509206 + 190509207.

It is an arithmetic number, because the mean of its divisors is an integer number (190509207).

Almost surely, 2^381018413 is an apocalyptic number.

It is an amenable number.

381018413 is a deficient number, since it is larger than the sum of its proper divisors (1).

381018413 is an equidigital number, since it uses as much as digits as its factorization.

381018413 is an evil number, because the sum of its binary digits is even.

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

The square root of 381018413 is about 19519.6929535277. The cubic root of 381018413 is about 724.9621307212.

Adding to 381018413 its reverse (314810183), we get a palindrome (695828596).

The spelling of 381018413 in words is "three hundred eighty-one million, eighteen thousand, four hundred thirteen".