381423253 has 2 divisors, whose sum is σ = 381423254. Its totient is φ = 381423252.

The previous prime is 381423239. The next prime is 381423257. The reversal of 381423253 is 352324183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339406929 + 42016324 = 18423^2 + 6482^2 .

It is an emirp because it is prime and its reverse (352324183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381423253 - 2²⁵ = 347868821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381423257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190711626 + 190711627.

It is an arithmetic number, because the mean of its divisors is an integer number (190711627).

Almost surely, 2^381423253 is an apocalyptic number.

It is an amenable number.

381423253 is a deficient number, since it is larger than the sum of its proper divisors (1).

381423253 is an equidigital number, since it uses as much as digits as its factorization.

381423253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 381423253 is about 19530.0602405625. The cubic root of 381423253 is about 725.2188022910.

The spelling of 381423253 in words is "three hundred eighty-one million, four hundred twenty-three thousand, two hundred fifty-three".