43375649 has 4 divisors (see below), whose sum is σ = 43409664. Its totient is φ = 43341636.

The previous prime is 43375643. The next prime is 43375681. The reversal of 43375649 is 94657334.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43375649 - 2²⁴ = 26598433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43375643) 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, 15017 + ... + 17670.

It is an arithmetic number, because the mean of its divisors is an integer number (10852416).

Almost surely, 2^43375649 is an apocalyptic number.

It is an amenable number.

43375649 is a deficient number, since it is larger than the sum of its proper divisors (34015).

43375649 is a wasteful number, since it uses less digits than its factorization.

43375649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34014.

The product of its digits is 272160, while the sum is 41.

The square root of 43375649 is about 6586.0192073816. The cubic root of 43375649 is about 351.3570417969.

The spelling of 43375649 in words is "forty-three million, three hundred seventy-five thousand, six hundred forty-nine".