396109109 has 12 divisors (see below), whose sum is σ = 435907500. Its totient is φ = 359673600.

The previous prime is 396109073. The next prime is 396109141. The reversal of 396109109 is 901901693.

It can be written as a sum of positive squares in 2 ways, for example, as 249166225 + 146942884 = 15785^2 + 12122^2 .

It is not a de Polignac number, because 396109109 - 2¹² = 396105013 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 (396103109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149819 + ... + 152439.

It is an arithmetic number, because the mean of its divisors is an integer number (36325625).

Almost surely, 2^396109109 is an apocalyptic number.

It is an amenable number.

396109109 is a deficient number, since it is larger than the sum of its proper divisors (39798391).

396109109 is a wasteful number, since it uses less digits than its factorization.

396109109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 3881 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 396109109 is about 19902.4900200955. The cubic root of 396109109 is about 734.4094838891.

The spelling of 396109109 in words is "three hundred ninety-six million, one hundred nine thousand, one hundred nine".