42788743 has 2 divisors, whose sum is σ = 42788744. Its totient is φ = 42788742.

The previous prime is 42788729. The next prime is 42788749. The reversal of 42788743 is 34788724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42788743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42788743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42788749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394371 + 21394372.

It is an arithmetic number, because the mean of its divisors is an integer number (21394372).

Almost surely, 2^42788743 is an apocalyptic number.

42788743 is a deficient number, since it is larger than the sum of its proper divisors (1).

42788743 is an equidigital number, since it uses as much as digits as its factorization.

42788743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 43.

The square root of 42788743 is about 6541.3104956117. The cubic root of 42788743 is about 349.7651294982.

The spelling of 42788743 in words is "forty-two million, seven hundred eighty-eight thousand, seven hundred forty-three".