381623369 has 2 divisors, whose sum is σ = 381623370. Its totient is φ = 381623368.

The previous prime is 381623353. The next prime is 381623401. The reversal of 381623369 is 963326183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317302969 + 64320400 = 17813^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 381623369 - 2⁴ = 381623353 is a prime.

It is a super-2 number, since 2×381623369² = 291272791533820322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381623969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190811684 + 190811685.

It is an arithmetic number, because the mean of its divisors is an integer number (190811685).

Almost surely, 2^381623369 is an apocalyptic number.

It is an amenable number.

381623369 is a deficient number, since it is larger than the sum of its proper divisors (1).

381623369 is an equidigital number, since it uses as much as digits as its factorization.

381623369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 381623369 is about 19535.1828504368. The cubic root of 381623369 is about 725.3456102498.

The spelling of 381623369 in words is "three hundred eighty-one million, six hundred twenty-three thousand, three hundred sixty-nine".