381908061 has 8 divisors (see below), whose sum is σ = 565789760. Its totient is φ = 254605356.

The previous prime is 381908057. The next prime is 381908081. The reversal of 381908061 is 160809183.

It is not a de Polignac number, because 381908061 - 2² = 381908057 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 (381908081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7072345 + ... + 7072398.

It is an arithmetic number, because the mean of its divisors is an integer number (70723720).

Almost surely, 2^381908061 is an apocalyptic number.

It is an amenable number.

381908061 is a deficient number, since it is larger than the sum of its proper divisors (183881699).

381908061 is a wasteful number, since it uses less digits than its factorization.

381908061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14144752 (or 14144746 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 381908061 is about 19542.4681399254. The cubic root of 381908061 is about 725.5259353038.

The spelling of 381908061 in words is "three hundred eighty-one million, nine hundred eight thousand, sixty-one".