42372689 has 2 divisors, whose sum is σ = 42372690. Its totient is φ = 42372688.

The previous prime is 42372623. The next prime is 42372697. The reversal of 42372689 is 98627324.

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., 31449664 + 10923025 = 5608^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 42372689 - 2⁸ = 42372433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42371689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21186344 + 21186345.

It is an arithmetic number, because the mean of its divisors is an integer number (21186345).

Almost surely, 2^42372689 is an apocalyptic number.

It is an amenable number.

42372689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42372689 is an equidigital number, since it uses as much as digits as its factorization.

42372689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 42372689 is about 6509.4307738849. The cubic root of 42372689 is about 348.6277945266.

The spelling of 42372689 in words is "forty-two million, three hundred seventy-two thousand, six hundred eighty-nine".