43390733 has 2 divisors, whose sum is σ = 43390734. Its totient is φ = 43390732.

The previous prime is 43390709. The next prime is 43390759. The reversal of 43390733 is 33709334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35976004 + 7414729 = 5998^2 + 2723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43390733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43390733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43390133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21695366 + 21695367.

It is an arithmetic number, because the mean of its divisors is an integer number (21695367).

Almost surely, 2^43390733 is an apocalyptic number.

It is an amenable number.

43390733 is a deficient number, since it is larger than the sum of its proper divisors (1).

43390733 is an equidigital number, since it uses as much as digits as its factorization.

43390733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 32.

The square root of 43390733 is about 6587.1642608941. The cubic root of 43390733 is about 351.3977655325.

The spelling of 43390733 in words is "forty-three million, three hundred ninety thousand, seven hundred thirty-three".