43329961 has 2 divisors, whose sum is σ = 43329962. Its totient is φ = 43329960.

The previous prime is 43329941. The next prime is 43329967. The reversal of 43329961 is 16992334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23474025 + 19855936 = 4845^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 43329961 - 2⁹ = 43329449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43329961.

It is not a weakly prime, because it can be changed into another prime (43329967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21664980 + 21664981.

It is an arithmetic number, because the mean of its divisors is an integer number (21664981).

Almost surely, 2^43329961 is an apocalyptic number.

It is an amenable number.

43329961 is a deficient number, since it is larger than the sum of its proper divisors (1).

43329961 is an equidigital number, since it uses as much as digits as its factorization.

43329961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 43329961 is about 6582.5497339557. The cubic root of 43329961 is about 351.2336358430.

The spelling of 43329961 in words is "forty-three million, three hundred twenty-nine thousand, nine hundred sixty-one".