381705707 has 4 divisors (see below), whose sum is σ = 381744936. Its totient is φ = 381666480.

The previous prime is 381705703. The next prime is 381705713. The reversal of 381705707 is 707507183.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 381705707 - 2² = 381705703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381705703) 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, 7208 + ... + 28554.

It is an arithmetic number, because the mean of its divisors is an integer number (95436234).

Almost surely, 2^381705707 is an apocalyptic number.

381705707 is a deficient number, since it is larger than the sum of its proper divisors (39229).

381705707 is a wasteful number, since it uses less digits than its factorization.

381705707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39228.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 381705707 is about 19537.2901652199. The cubic root of 381705707 is about 725.3977726845.

The spelling of 381705707 in words is "three hundred eighty-one million, seven hundred five thousand, seven hundred seven".