42933661 has 2 divisors, whose sum is σ = 42933662. Its totient is φ = 42933660.

The previous prime is 42933623. The next prime is 42933677. The reversal of 42933661 is 16633924.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36832761 + 6100900 = 6069^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 42933661 - 2¹⁷ = 42802589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42933361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21466830 + 21466831.

It is an arithmetic number, because the mean of its divisors is an integer number (21466831).

Almost surely, 2^42933661 is an apocalyptic number.

It is an amenable number.

42933661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42933661 is an equidigital number, since it uses as much as digits as its factorization.

42933661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 42933661 is about 6552.3782705213. The cubic root of 42933661 is about 350.1595490265.

The spelling of 42933661 in words is "forty-two million, nine hundred thirty-three thousand, six hundred sixty-one".