387685103221 has 8 divisors (see below), whose sum is σ = 419330212280. Its totient is φ = 356300448192.

The previous prime is 387685103171. The next prime is 387685103233. The reversal of 387685103221 is 122301586783.

It can be written as a sum of positive squares in 4 ways, for example, as 66633678225 + 321051424996 = 258135^2 + 566614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387685103221 - 2³¹ = 385537619573 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 (387685103291) 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, 65110410 + ... + 65116363.

It is an arithmetic number, because the mean of its divisors is an integer number (52416276535).

Almost surely, 2^387685103221 is an apocalyptic number.

It is an amenable number.

387685103221 is a deficient number, since it is larger than the sum of its proper divisors (31645109059).

387685103221 is a wasteful number, since it uses less digits than its factorization.

387685103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130227015.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 387685103221 in words is "three hundred eighty-seven billion, six hundred eighty-five million, one hundred three thousand, two hundred twenty-one".