43394437 has 2 divisors, whose sum is σ = 43394438. Its totient is φ = 43394436.

The previous prime is 43394413. The next prime is 43394453. The reversal of 43394437 is 73449334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24740676 + 18653761 = 4974^2 + 4319^2 .

It is a cyclic number.

It is not a de Polignac number, because 43394437 - 2¹¹ = 43392389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43394396 and 43394405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43394467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21697218 + 21697219.

It is an arithmetic number, because the mean of its divisors is an integer number (21697219).

Almost surely, 2^43394437 is an apocalyptic number.

It is an amenable number.

43394437 is a deficient number, since it is larger than the sum of its proper divisors (1).

43394437 is an equidigital number, since it uses as much as digits as its factorization.

43394437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 37.

The square root of 43394437 is about 6587.4454077434. The cubic root of 43394437 is about 351.4077641367.

The spelling of 43394437 in words is "forty-three million, three hundred ninety-four thousand, four hundred thirty-seven".