386513749 has 4 divisors (see below), whose sum is σ = 387256140. Its totient is φ = 385771360.

The previous prime is 386513737. The next prime is 386513753. The reversal of 386513749 is 947315683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 947315683 = 167 ⋅5672549.

It can be written as a sum of positive squares in 2 ways, for example, as 141372100 + 245141649 = 11890^2 + 15657^2 .

It is a cyclic number.

It is not a de Polignac number, because 386513749 - 2¹⁵ = 386480981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 386513699 and 386513708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386513719) 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, 370414 + ... + 371455.

It is an arithmetic number, because the mean of its divisors is an integer number (96814035).

Almost surely, 2^386513749 is an apocalyptic number.

It is an amenable number.

386513749 is a deficient number, since it is larger than the sum of its proper divisors (742391).

386513749 is an equidigital number, since it uses as much as digits as its factorization.

386513749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742390.

The product of its digits is 544320, while the sum is 46.

The square root of 386513749 is about 19659.9529246639. The cubic root of 386513749 is about 728.4308252997.

The spelling of 386513749 in words is "three hundred eighty-six million, five hundred thirteen thousand, seven hundred forty-nine".