387084721 has 8 divisors (see below), whose sum is σ = 400752000. Its totient is φ = 373438800.

The previous prime is 387084683. The next prime is 387084743. The reversal of 387084721 is 127480783.

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

It is not a de Polignac number, because 387084721 - 2⁹ = 387084209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387084751) 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, 37480 + ... + 46678.

It is an arithmetic number, because the mean of its divisors is an integer number (50094000).

Almost surely, 2^387084721 is an apocalyptic number.

It is an amenable number.

387084721 is a deficient number, since it is larger than the sum of its proper divisors (13667279).

387084721 is a wasteful number, since it uses less digits than its factorization.

387084721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10679.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 387084721 is about 19674.4687602995. The cubic root of 387084721 is about 728.7893368863.

The spelling of 387084721 in words is "three hundred eighty-seven million, eighty-four thousand, seven hundred twenty-one".