381711563 has 4 divisors (see below), whose sum is σ = 383197080. Its totient is φ = 380226048.

The previous prime is 381711503. The next prime is 381711613. The reversal of 381711563 is 365117183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365117183 = 2777 ⋅131479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381711563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381711503) 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, 742373 + ... + 742886.

It is an arithmetic number, because the mean of its divisors is an integer number (95799270).

Almost surely, 2^381711563 is an apocalyptic number.

381711563 is a deficient number, since it is larger than the sum of its proper divisors (1485517).

381711563 is a wasteful number, since it uses less digits than its factorization.

381711563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485516.

The product of its digits is 15120, while the sum is 35.

The square root of 381711563 is about 19537.4400318977. The cubic root of 381711563 is about 725.4014822680.

The spelling of 381711563 in words is "three hundred eighty-one million, seven hundred eleven thousand, five hundred sixty-three".