393115389 has 4 divisors (see below), whose sum is σ = 524153856. Its totient is φ = 262076924.

The previous prime is 393115351. The next prime is 393115409. The reversal of 393115389 is 983511393.

It is a happy number.

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 393115389 - 2⁸ = 393115133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 393115389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393115319) 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, 65519229 + ... + 65519234.

It is an arithmetic number, because the mean of its divisors is an integer number (131038464).

Almost surely, 2^393115389 is an apocalyptic number.

It is an amenable number.

393115389 is a deficient number, since it is larger than the sum of its proper divisors (131038467).

393115389 is a wasteful number, since it uses less digits than its factorization.

393115389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131038466.

The product of its digits is 87480, while the sum is 42.

The square root of 393115389 is about 19827.1376905493. The cubic root of 393115389 is about 732.5546257219.

The spelling of 393115389 in words is "three hundred ninety-three million, one hundred fifteen thousand, three hundred eighty-nine".