393106903 has 16 divisors (see below), whose sum is σ = 483915520. Its totient is φ = 311786496.

The previous prime is 393106891. The next prime is 393106921. The reversal of 393106903 is 309601393.

It is a happy number.

It is not a de Polignac number, because 393106903 - 2⁵ = 393106871 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 (393106933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28650 + ... + 40087.

It is an arithmetic number, because the mean of its divisors is an integer number (30244720).

Almost surely, 2^393106903 is an apocalyptic number.

393106903 is a deficient number, since it is larger than the sum of its proper divisors (90808617).

393106903 is a wasteful number, since it uses less digits than its factorization.

393106903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 393106903 is about 19826.9236897709. The cubic root of 393106903 is about 732.5493545781.

The spelling of 393106903 in words is "three hundred ninety-three million, one hundred six thousand, nine hundred three".