381676663 has 4 divisors (see below), whose sum is σ = 383962320. Its totient is φ = 379391008.

The previous prime is 381676609. The next prime is 381676703. The reversal of 381676663 is 366676183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366676183 = 2719 ⋅134857.

It is a cyclic number.

It is not a de Polignac number, because 381676663 - 2¹³ = 381668471 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 (381676363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142578 + ... + 1142911.

It is an arithmetic number, because the mean of its divisors is an integer number (95990580).

Almost surely, 2^381676663 is an apocalyptic number.

381676663 is a deficient number, since it is larger than the sum of its proper divisors (2285657).

381676663 is a wasteful number, since it uses less digits than its factorization.

381676663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285656.

The product of its digits is 653184, while the sum is 46.

The square root of 381676663 is about 19536.5468545493. The cubic root of 381676663 is about 725.3793737042.

The spelling of 381676663 in words is "three hundred eighty-one million, six hundred seventy-six thousand, six hundred sixty-three".