386918869 has 4 divisors (see below), whose sum is σ = 407283040. Its totient is φ = 366554700.

The previous prime is 386918839. The next prime is 386918881. The reversal of 386918869 is 968819683.

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 an emirpimes, since its reverse is a distinct semiprime: 968819683 = 13 ⋅74524591.

It is a cyclic number.

It is not a de Polignac number, because 386918869 - 2¹³ = 386910677 is a prime.

It is a super-2 number, since 2×386918869² = 299412422376478322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386918839) 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, 10182057 + ... + 10182094.

It is an arithmetic number, because the mean of its divisors is an integer number (101820760).

Almost surely, 2^386918869 is an apocalyptic number.

It is an amenable number.

386918869 is a deficient number, since it is larger than the sum of its proper divisors (20364171).

386918869 is a wasteful number, since it uses less digits than its factorization.

386918869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20364170.

The product of its digits is 4478976, while the sum is 58.

The square root of 386918869 is about 19670.2534045701. The cubic root of 386918869 is about 728.6852352692.

The spelling of 386918869 in words is "three hundred eighty-six million, nine hundred eighteen thousand, eight hundred sixty-nine".