387090621 has 24 divisors (see below), whose sum is σ = 586435200. Its totient is φ = 245573856.

The previous prime is 387090611. The next prime is 387090631. The reversal of 387090621 is 126090783.

It is an interprime number because it is at equal distance from previous prime (387090611) and next prime (387090631).

It is not a de Polignac number, because 387090621 - 2¹⁷ = 386959549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387090611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36495 + ... + 45891.

It is an arithmetic number, because the mean of its divisors is an integer number (24434800).

Almost surely, 2^387090621 is an apocalyptic number.

It is an amenable number.

387090621 is a deficient number, since it is larger than the sum of its proper divisors (199344579).

387090621 is a wasteful number, since it uses less digits than its factorization.

387090621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9625 (or 9622 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 387090621 is about 19674.6187002442. The cubic root of 387090621 is about 728.7930396375.

The spelling of 387090621 in words is "three hundred eighty-seven million, ninety thousand, six hundred twenty-one".