42940693 has 2 divisors, whose sum is σ = 42940694. Its totient is φ = 42940692.

The previous prime is 42940679. The next prime is 42940697. The reversal of 42940693 is 39604924.

42940693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38912644 + 4028049 = 6238^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 42940693 - 2²¹ = 40843541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42940697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21470346 + 21470347.

It is an arithmetic number, because the mean of its divisors is an integer number (21470347).

Almost surely, 2^42940693 is an apocalyptic number.

It is an amenable number.

42940693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42940693 is an equidigital number, since it uses as much as digits as its factorization.

42940693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 42940693 is about 6552.9148476079. The cubic root of 42940693 is about 350.1786652434.

The spelling of 42940693 in words is "forty-two million, nine hundred forty thousand, six hundred ninety-three".