381124817 has 2 divisors, whose sum is σ = 381124818. Its totient is φ = 381124816.

The previous prime is 381124759. The next prime is 381124883. The reversal of 381124817 is 718421183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378535936 + 2588881 = 19456^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 381124817 - 2²⁰ = 380076241 is a prime.

It is a super-2 number, since 2×381124817² = 290512252266566978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381124217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190562408 + 190562409.

It is an arithmetic number, because the mean of its divisors is an integer number (190562409).

Almost surely, 2^381124817 is an apocalyptic number.

It is an amenable number.

381124817 is a deficient number, since it is larger than the sum of its proper divisors (1).

381124817 is an equidigital number, since it uses as much as digits as its factorization.

381124817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 381124817 is about 19522.4183184359. The cubic root of 381124817 is about 725.0296092545.

The spelling of 381124817 in words is "three hundred eighty-one million, one hundred twenty-four thousand, eight hundred seventeen".