43432661 has 2 divisors, whose sum is σ = 43432662. Its totient is φ = 43432660.

The previous prime is 43432619. The next prime is 43432663. The reversal of 43432661 is 16623434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43151761 + 280900 = 6569^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 43432661 - 2¹⁰ = 43431637 is a prime.

Together with 43432663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43432663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21716330 + 21716331.

It is an arithmetic number, because the mean of its divisors is an integer number (21716331).

Almost surely, 2^43432661 is an apocalyptic number.

It is an amenable number.

43432661 is a deficient number, since it is larger than the sum of its proper divisors (1).

43432661 is an equidigital number, since it uses as much as digits as its factorization.

43432661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 29.

The square root of 43432661 is about 6590.3460455427. The cubic root of 43432661 is about 351.5109130602.

The spelling of 43432661 in words is "forty-three million, four hundred thirty-two thousand, six hundred sixty-one".