387221577 has 16 divisors (see below), whose sum is σ = 548857920. Its totient is φ = 242136000.

The previous prime is 387221561. The next prime is 387221587. The reversal of 387221577 is 775122783.

It is not a de Polignac number, because 387221577 - 2⁴ = 387221561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387221587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27874 + ... + 39387.

It is an arithmetic number, because the mean of its divisors is an integer number (34303620).

Almost surely, 2^387221577 is an apocalyptic number.

It is an amenable number.

387221577 is a deficient number, since it is larger than the sum of its proper divisors (161636343).

387221577 is a wasteful number, since it uses less digits than its factorization.

387221577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67384.

The product of its digits is 164640, while the sum is 42.

The square root of 387221577 is about 19677.9464629824. The cubic root of 387221577 is about 728.8752159682.

The spelling of 387221577 in words is "three hundred eighty-seven million, two hundred twenty-one thousand, five hundred seventy-seven".