43690683509 has 6 divisors (see below), whose sum is σ = 48023643990. Its totient is φ = 39718803080.

The previous prime is 43690683503. The next prime is 43690683529. The reversal of 43690683509 is 90538609634.

43690683509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 43671804484 + 18879025 = 208978^2 + 4345^2 .

It is not a de Polignac number, because 43690683509 - 2¹² = 43690679413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43690683503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180539894 + ... + 180540135.

It is an arithmetic number, because the mean of its divisors is an integer number (8003940665).

Almost surely, 2^43690683509 is an apocalyptic number.

It is an amenable number.

43690683509 is a deficient number, since it is larger than the sum of its proper divisors (4332960481).

43690683509 is a wasteful number, since it uses less digits than its factorization.

43690683509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361080051 (or 361080040 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 53.

The spelling of 43690683509 in words is "forty-three billion, six hundred ninety million, six hundred eighty-three thousand, five hundred nine".