387724047 has 4 divisors (see below), whose sum is σ = 516965400. Its totient is φ = 258482696.

The previous prime is 387724039. The next prime is 387724063. The reversal of 387724047 is 740427783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740427783 = 3 ⋅246809261.

It is a cyclic number.

It is not a de Polignac number, because 387724047 - 2³ = 387724039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387724247) 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, 64620672 + ... + 64620677.

It is an arithmetic number, because the mean of its divisors is an integer number (129241350).

Almost surely, 2^387724047 is an apocalyptic number.

387724047 is a deficient number, since it is larger than the sum of its proper divisors (129241353).

387724047 is a wasteful number, since it uses less digits than its factorization.

387724047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129241352.

The product of its (nonzero) digits is 263424, while the sum is 42.

The square root of 387724047 is about 19690.7096621732. The cubic root of 387724047 is about 729.1903496039.

The spelling of 387724047 in words is "three hundred eighty-seven million, seven hundred twenty-four thousand, forty-seven".