387449317 has 4 divisors (see below), whose sum is σ = 387497376. Its totient is φ = 387401260.

The previous prime is 387449291. The next prime is 387449323. The reversal of 387449317 is 713944783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 713944783 = 157 ⋅4547419.

It is a cyclic number.

It is not a de Polignac number, because 387449317 - 2⁷ = 387449189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387449327) 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, 8659 + ... + 29152.

It is an arithmetic number, because the mean of its divisors is an integer number (96874344).

Almost surely, 2^387449317 is an apocalyptic number.

It is an amenable number.

387449317 is a deficient number, since it is larger than the sum of its proper divisors (48059).

387449317 is a wasteful number, since it uses less digits than its factorization.

387449317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48058.

The product of its digits is 508032, while the sum is 46.

The square root of 387449317 is about 19683.7322934448. The cubic root of 387449317 is about 729.0180812075.

The spelling of 387449317 in words is "three hundred eighty-seven million, four hundred forty-nine thousand, three hundred seventeen".