43390745 has 4 divisors (see below), whose sum is σ = 52068900. Its totient is φ = 34712592.

The previous prime is 43390733. The next prime is 43390759. The reversal of 43390745 is 54709334.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33131536 + 10259209 = 5756^2 + 3203^2 .

It is a cyclic number.

It is not a de Polignac number, because 43390745 - 2¹² = 43386649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4339070 + ... + 4339079.

It is an arithmetic number, because the mean of its divisors is an integer number (13017225).

Almost surely, 2^43390745 is an apocalyptic number.

It is an amenable number.

43390745 is a deficient number, since it is larger than the sum of its proper divisors (8678155).

43390745 is an equidigital number, since it uses as much as digits as its factorization.

43390745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678154.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 43390745 is about 6587.1651717564. The cubic root of 43390745 is about 351.3977979263.

The spelling of 43390745 in words is "forty-three million, three hundred ninety thousand, seven hundred forty-five".