387087947 has 4 divisors (see below), whose sum is σ = 387270720. Its totient is φ = 386905176.

The previous prime is 387087889. The next prime is 387087971. The reversal of 387087947 is 749780783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749780783 = 1559 ⋅480937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387087947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387087997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88172 + ... + 92457.

It is an arithmetic number, because the mean of its divisors is an integer number (96817680).

Almost surely, 2^387087947 is an apocalyptic number.

387087947 is a deficient number, since it is larger than the sum of its proper divisors (182773).

387087947 is a wasteful number, since it uses less digits than its factorization.

387087947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182772.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The square root of 387087947 is about 19674.5507445532. The cubic root of 387087947 is about 728.7913614800.

The spelling of 387087947 in words is "three hundred eighty-seven million, eighty-seven thousand, nine hundred forty-seven".