388313869 has 4 divisors (see below), whose sum is σ = 394895520. Its totient is φ = 381732220.

The previous prime is 388313831. The next prime is 388313879. The reversal of 388313869 is 968313883.

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: 968313883 = 4127 ⋅234629.

It is a cyclic number.

It is not a de Polignac number, because 388313869 - 2¹³ = 388305677 is a prime.

It is a super-2 number, since 2×388313869² = 301575321715498322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388313819) 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, 3290737 + ... + 3290854.

It is an arithmetic number, because the mean of its divisors is an integer number (98723880).

Almost surely, 2^388313869 is an apocalyptic number.

It is an amenable number.

388313869 is a deficient number, since it is larger than the sum of its proper divisors (6581651).

388313869 is an equidigital number, since it uses as much as digits as its factorization.

388313869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6581650.

The product of its digits is 746496, while the sum is 49.

The square root of 388313869 is about 19705.6811351448. The cubic root of 388313869 is about 729.5599205280.

The spelling of 388313869 in words is "three hundred eighty-eight million, three hundred thirteen thousand, eight hundred sixty-nine".