387621663 has 16 divisors (see below), whose sum is σ = 607184256. Its totient is φ = 216851040.

The previous prime is 387621593. The next prime is 387621673. The reversal of 387621663 is 366126783.

It is not a de Polignac number, because 387621663 - 2⁹ = 387621151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387621673) 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, 451345 + ... + 452202.

It is an arithmetic number, because the mean of its divisors is an integer number (37949016).

Almost surely, 2^387621663 is an apocalyptic number.

387621663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

387621663 is a deficient number, since it is larger than the sum of its proper divisors (219562593).

387621663 is a wasteful number, since it uses less digits than its factorization.

387621663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903574.

The product of its digits is 217728, while the sum is 42.

The square root of 387621663 is about 19688.1096857977. The cubic root of 387621663 is about 729.1261596233.

The spelling of 387621663 in words is "three hundred eighty-seven million, six hundred twenty-one thousand, six hundred sixty-three".