42367789 has 2 divisors, whose sum is σ = 42367790. Its totient is φ = 42367788.

The previous prime is 42367747. The next prime is 42367799. The reversal of 42367789 is 98776324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31753225 + 10614564 = 5635^2 + 3258^2 .

It is a cyclic number.

It is not a de Polignac number, because 42367789 - 2⁹ = 42367277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42367729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21183894 + 21183895.

It is an arithmetic number, because the mean of its divisors is an integer number (21183895).

Almost surely, 2^42367789 is an apocalyptic number.

It is an amenable number.

42367789 is a deficient number, since it is larger than the sum of its proper divisors (1).

42367789 is an equidigital number, since it uses as much as digits as its factorization.

42367789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 42367789 is about 6509.0543860072. The cubic root of 42367789 is about 348.6143555082.

The spelling of 42367789 in words is "forty-two million, three hundred sixty-seven thousand, seven hundred eighty-nine".