43149637 has 2 divisors, whose sum is σ = 43149638. Its totient is φ = 43149636.

The previous prime is 43149607. The next prime is 43149641. The reversal of 43149637 is 73694134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26224641 + 16924996 = 5121^2 + 4114^2 .

It is a cyclic number.

It is not a de Polignac number, because 43149637 - 2¹¹ = 43147589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43149596 and 43149605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43149607) 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, 21574818 + 21574819.

It is an arithmetic number, because the mean of its divisors is an integer number (21574819).

Almost surely, 2^43149637 is an apocalyptic number.

It is an amenable number.

43149637 is a deficient number, since it is larger than the sum of its proper divisors (1).

43149637 is an equidigital number, since it uses as much as digits as its factorization.

43149637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 43149637 is about 6568.8383295679. The cubic root of 43149637 is about 350.7457215771.

The spelling of 43149637 in words is "forty-three million, one hundred forty-nine thousand, six hundred thirty-seven".