42689623 has 2 divisors, whose sum is σ = 42689624. Its totient is φ = 42689622.

The previous prime is 42689617. The next prime is 42689629. The reversal of 42689623 is 32698624.

42689623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42689617) and next prime (42689629).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42689623 is a prime.

It is a super-3 number, since 3×42689623³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42689629) 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, 21344811 + 21344812.

It is an arithmetic number, because the mean of its divisors is an integer number (21344812).

Almost surely, 2^42689623 is an apocalyptic number.

42689623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42689623 is an equidigital number, since it uses as much as digits as its factorization.

42689623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 42689623 is about 6533.7296393408. The cubic root of 42689623 is about 349.4948440469.

Subtracting from 42689623 its reverse (32698624), we obtain a palindrome (9990999).

The spelling of 42689623 in words is "forty-two million, six hundred eighty-nine thousand, six hundred twenty-three".