381917263 has 8 divisors (see below), whose sum is σ = 470052128. Its totient is φ = 302176224.

The previous prime is 381917213. The next prime is 381917267. The reversal of 381917263 is 362719183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381917263 - 2²⁵ = 348362831 is a prime.

It is a super-2 number, since 2×381917263² = 291721591554822338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381917267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2098356 + ... + 2098537.

It is an arithmetic number, because the mean of its divisors is an integer number (58756516).

Almost surely, 2^381917263 is an apocalyptic number.

381917263 is a deficient number, since it is larger than the sum of its proper divisors (88134865).

381917263 is a wasteful number, since it uses less digits than its factorization.

381917263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196913.

The product of its digits is 54432, while the sum is 40.

The square root of 381917263 is about 19542.7035744802. The cubic root of 381917263 is about 725.5317623922.

It can be divided in two parts, 38191 and 7263, that added together give a palindrome (45454).

The spelling of 381917263 in words is "three hundred eighty-one million, nine hundred seventeen thousand, two hundred sixty-three".