42438653 has 2 divisors, whose sum is σ = 42438654. Its totient is φ = 42438652.

The previous prime is 42438631. The next prime is 42438673. The reversal of 42438653 is 35683424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25775929 + 16662724 = 5077^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 42438653 - 2¹⁶ = 42373117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42438673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21219326 + 21219327.

It is an arithmetic number, because the mean of its divisors is an integer number (21219327).

Almost surely, 2^42438653 is an apocalyptic number.

It is an amenable number.

42438653 is a deficient number, since it is larger than the sum of its proper divisors (1).

42438653 is an equidigital number, since it uses as much as digits as its factorization.

42438653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 35.

The square root of 42438653 is about 6514.4956059545. The cubic root of 42438653 is about 348.8086103710.

The spelling of 42438653 in words is "forty-two million, four hundred thirty-eight thousand, six hundred fifty-three".