381137663 has 6 divisors (see below), whose sum is σ = 402253704. Its totient is φ = 361077444.

The previous prime is 381137657. The next prime is 381137689. The reversal of 381137663 is 366731183.

It is not a de Polignac number, because 381137663 - 2¹⁸ = 380875519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381137063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 527531 + ... + 528252.

It is an arithmetic number, because the mean of its divisors is an integer number (67042284).

Almost surely, 2^381137663 is an apocalyptic number.

381137663 is a deficient number, since it is larger than the sum of its proper divisors (21116041).

381137663 is a wasteful number, since it uses less digits than its factorization.

381137663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055821 (or 1055802 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 381137663 is about 19522.7473220344. The cubic root of 381137663 is about 725.0377549898.

The spelling of 381137663 in words is "three hundred eighty-one million, one hundred thirty-seven thousand, six hundred sixty-three".