387641313 has 6 divisors (see below), whose sum is σ = 559926354. Its totient is φ = 258427536.

The previous prime is 387641263. The next prime is 387641339. The reversal of 387641313 is 313146783.

387641313 is a `hidden beast` number, since 3 + 8 + 7 + 641 + 3 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 215296929 + 172344384 = 14673^2 + 13128^2 .

It is not a de Polignac number, because 387641313 - 2¹³ = 387633121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (387641213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21535620 + ... + 21535637.

It is an arithmetic number, because the mean of its divisors is an integer number (93321059).

Almost surely, 2^387641313 is an apocalyptic number.

It is an amenable number.

387641313 is a deficient number, since it is larger than the sum of its proper divisors (172285041).

387641313 is a wasteful number, since it uses less digits than its factorization.

387641313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43071263 (or 43071260 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 387641313 is about 19688.6087116383. The cubic root of 387641313 is about 729.1384801309.

The spelling of 387641313 in words is "three hundred eighty-seven million, six hundred forty-one thousand, three hundred thirteen".