381337213 has 2 divisors, whose sum is σ = 381337214. Its totient is φ = 381337212.

The previous prime is 381337189. The next prime is 381337219. The reversal of 381337213 is 312733183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201696804 + 179640409 = 14202^2 + 13403^2 .

It is a cyclic number.

It is not a de Polignac number, because 381337213 - 2⁹ = 381336701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381337219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190668606 + 190668607.

It is an arithmetic number, because the mean of its divisors is an integer number (190668607).

Almost surely, 2^381337213 is an apocalyptic number.

It is an amenable number.

381337213 is a deficient number, since it is larger than the sum of its proper divisors (1).

381337213 is an equidigital number, since it uses as much as digits as its factorization.

381337213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 381337213 is about 19527.8573581435. The cubic root of 381337213 is about 725.1642674947.

The spelling of 381337213 in words is "three hundred eighty-one million, three hundred thirty-seven thousand, two hundred thirteen".