42789031 has 2 divisors, whose sum is σ = 42789032. Its totient is φ = 42789030.

The previous prime is 42789013. The next prime is 42789041. The reversal of 42789031 is 13098724.

42789031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (42789013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42789031 - 2⁹ = 42788519 is a prime.

It is a super-2 number, since 2×42789031² = 3661802347837922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42789001) 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, 21394515 + 21394516.

It is an arithmetic number, because the mean of its divisors is an integer number (21394516).

Almost surely, 2^42789031 is an apocalyptic number.

42789031 is a deficient number, since it is larger than the sum of its proper divisors (1).

42789031 is an equidigital number, since it uses as much as digits as its factorization.

42789031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42789031 is about 6541.3325095121. The cubic root of 42789031 is about 349.7659142228.

The spelling of 42789031 in words is "forty-two million, seven hundred eighty-nine thousand, thirty-one".