43957409 has 8 divisors (see below), whose sum is σ = 44436000. Its totient is φ = 43481376.

The previous prime is 43957399. The next prime is 43957421. The reversal of 43957409 is 90475934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43957409 - 2⁸ = 43957153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43957489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68042 + ... + 68684.

It is an arithmetic number, because the mean of its divisors is an integer number (5554500).

Almost surely, 2^43957409 is an apocalyptic number.

It is an amenable number.

43957409 is a deficient number, since it is larger than the sum of its proper divisors (478591).

43957409 is a wasteful number, since it uses less digits than its factorization.

43957409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 43957409 is about 6630.0383860126. The cubic root of 43957409 is about 352.9208868603.

The spelling of 43957409 in words is "forty-three million, nine hundred fifty-seven thousand, four hundred nine".