43693138 has 4 divisors (see below), whose sum is σ = 65539710. Its totient is φ = 21846568.

The previous prime is 43693093. The next prime is 43693151. The reversal of 43693138 is 83139634.

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

It can be written as a sum of positive squares in only one way, i.e., 27071209 + 16621929 = 5203^2 + 4077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43693097 and 43693106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10923283 + ... + 10923286.

Almost surely, 2^43693138 is an apocalyptic number.

43693138 is a deficient number, since it is larger than the sum of its proper divisors (21846572).

43693138 is a wasteful number, since it uses less digits than its factorization.

43693138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21846571.

The product of its digits is 46656, while the sum is 37.

The square root of 43693138 is about 6610.0785169316. The cubic root of 43693138 is about 352.2122138478.

The spelling of 43693138 in words is "forty-three million, six hundred ninety-three thousand, one hundred thirty-eight".