3659685123 has 4 divisors (see below), whose sum is σ = 4879580168. Its totient is φ = 2439790080.

The previous prime is 3659685103. The next prime is 3659685143. The reversal of 3659685123 is 3215869563.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3659685103) and next prime (3659685143).

It is not a de Polignac number, because 3659685123 - 2⁵ = 3659685091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3659685103) 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, 609947518 + ... + 609947523.

It is an arithmetic number, because the mean of its divisors is an integer number (1219895042).

Almost surely, 2^3659685123 is an apocalyptic number.

3659685123 is a deficient number, since it is larger than the sum of its proper divisors (1219895045).

3659685123 is a wasteful number, since it uses less digits than its factorization.

3659685123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219895044.

The product of its digits is 1166400, while the sum is 48.

The square root of 3659685123 is about 60495.3314149117. The cubic root of 3659685123 is about 1541.0423486648.

It can be divided in two parts, 365968 and 5123, that added together give a triangular number (371091 = T₈₆₁).

The spelling of 3659685123 in words is "three billion, six hundred fifty-nine million, six hundred eighty-five thousand, one hundred twenty-three".