381947577 has 16 divisors (see below), whose sum is σ = 555913920. Its totient is φ = 231336000.

The previous prime is 381947569. The next prime is 381947581. The reversal of 381947577 is 775749183.

It is not a de Polignac number, because 381947577 - 2³ = 381947569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381947597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72327 + ... + 77427.

It is an arithmetic number, because the mean of its divisors is an integer number (34744620).

Almost surely, 2^381947577 is an apocalyptic number.

It is an amenable number.

381947577 is a deficient number, since it is larger than the sum of its proper divisors (173966343).

381947577 is a wasteful number, since it uses less digits than its factorization.

381947577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384.

The product of its digits is 1481760, while the sum is 51.

The square root of 381947577 is about 19543.4791426706. The cubic root of 381947577 is about 725.5509578132.

The spelling of 381947577 in words is "three hundred eighty-one million, nine hundred forty-seven thousand, five hundred seventy-seven".