381611907 has 12 divisors (see below), whose sum is σ = 552033144. Its totient is φ = 254031360.

The previous prime is 381611897. The next prime is 381611911. The reversal of 381611907 is 709116183.

381611907 is a `hidden beast` number, since 38 + 1 + 611 + 9 + 0 + 7 = 666.

It is not a de Polignac number, because 381611907 - 2⁷ = 381611779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381611917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24894 + ... + 37187.

It is an arithmetic number, because the mean of its divisors is an integer number (46002762).

Almost surely, 2^381611907 is an apocalyptic number.

381611907 is a deficient number, since it is larger than the sum of its proper divisors (170421237).

381611907 is a wasteful number, since it uses less digits than its factorization.

381611907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62770 (or 62767 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 381611907 is about 19534.8894801071. The cubic root of 381611907 is about 725.3383482953.

The spelling of 381611907 in words is "three hundred eighty-one million, six hundred eleven thousand, nine hundred seven".