43849621 has 2 divisors, whose sum is σ = 43849622. Its totient is φ = 43849620.

The previous prime is 43849609. The next prime is 43849633. The reversal of 43849621 is 12694834.

It is a balanced prime because it is at equal distance from previous prime (43849609) and next prime (43849633).

It can be written as a sum of positive squares in only one way, i.e., 27447121 + 16402500 = 5239^2 + 4050^2 .

It is a cyclic number.

It is not a de Polignac number, because 43849621 - 2⁷ = 43849493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43849601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21924810 + 21924811.

It is an arithmetic number, because the mean of its divisors is an integer number (21924811).

Almost surely, 2^43849621 is an apocalyptic number.

It is an amenable number.

43849621 is a deficient number, since it is larger than the sum of its proper divisors (1).

43849621 is an equidigital number, since it uses as much as digits as its factorization.

43849621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 43849621 is about 6621.9046353749. The cubic root of 43849621 is about 352.6321848872.

The spelling of 43849621 in words is "forty-three million, eight hundred forty-nine thousand, six hundred twenty-one".