42979523 has 2 divisors, whose sum is σ = 42979524. Its totient is φ = 42979522.

The previous prime is 42979507. The next prime is 42979543. The reversal of 42979523 is 32597924.

42979523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42979523 - 2⁴ = 42979507 is a prime.

It is not a weakly prime, because it can be changed into another prime (42979543) 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, 21489761 + 21489762.

It is an arithmetic number, because the mean of its divisors is an integer number (21489762).

Almost surely, 2^42979523 is an apocalyptic number.

42979523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42979523 is an equidigital number, since it uses as much as digits as its factorization.

42979523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 42979523 is about 6555.8769817622. The cubic root of 42979523 is about 350.2841855172.

The spelling of 42979523 in words is "forty-two million, nine hundred seventy-nine thousand, five hundred twenty-three".