387313213 has 4 divisors (see below), whose sum is σ = 442643680. Its totient is φ = 331982748.

The previous prime is 387313211. The next prime is 387313231. The reversal of 387313213 is 312313783.

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.

It is a cyclic number.

It is not a de Polignac number, because 387313213 - 2¹ = 387313211 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 (387313211) 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, 27665223 + ... + 27665236.

It is an arithmetic number, because the mean of its divisors is an integer number (110660920).

Almost surely, 2^387313213 is an apocalyptic number.

It is an amenable number.

387313213 is a deficient number, since it is larger than the sum of its proper divisors (55330467).

387313213 is an equidigital number, since it uses as much as digits as its factorization.

387313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55330466.

The product of its digits is 9072, while the sum is 31.

The square root of 387313213 is about 19680.2747186110. The cubic root of 387313213 is about 728.9327075486.

Adding to 387313213 its reverse (312313783), we get a palindrome (699626996).

It can be divided in two parts, 387 and 313213, that added together give a square (313600 = 560²).

The spelling of 387313213 in words is "three hundred eighty-seven million, three hundred thirteen thousand, two hundred thirteen".