42756079 has 2 divisors, whose sum is σ = 42756080. Its totient is φ = 42756078.

The previous prime is 42756073. The next prime is 42756083. The reversal of 42756079 is 97065724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42756079 - 2⁵ = 42756047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42756073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21378039 + 21378040.

It is an arithmetic number, because the mean of its divisors is an integer number (21378040).

Almost surely, 2^42756079 is an apocalyptic number.

42756079 is a deficient number, since it is larger than the sum of its proper divisors (1).

42756079 is an equidigital number, since it uses as much as digits as its factorization.

42756079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 42756079 is about 6538.8132715348. The cubic root of 42756079 is about 349.6761057991.

The spelling of 42756079 in words is "forty-two million, seven hundred fifty-six thousand, seventy-nine".