390511117 has 4 divisors (see below), whose sum is σ = 390756636. Its totient is φ = 390265600.

The previous prime is 390511111. The next prime is 390511171. The reversal of 390511117 is 711115093.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711115093 = 13 ⋅54701161.

It can be written as a sum of positive squares in 2 ways, for example, as 210656196 + 179854921 = 14514^2 + 13411^2 .

It is a cyclic number.

It is not a de Polignac number, because 390511117 - 2¹¹ = 390509069 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 (390511111) 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, 120358 + ... + 123559.

It is an arithmetic number, because the mean of its divisors is an integer number (97689159).

Almost surely, 2^390511117 is an apocalyptic number.

It is an amenable number.

390511117 is a deficient number, since it is larger than the sum of its proper divisors (245519).

390511117 is a wasteful number, since it uses less digits than its factorization.

390511117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245518.

The product of its (nonzero) digits is 945, while the sum is 28.

The square root of 390511117 is about 19761.3541287028. The cubic root of 390511117 is about 730.9333885206.

The spelling of 390511117 in words is "three hundred ninety million, five hundred eleven thousand, one hundred seventeen".