42523879 has 2 divisors, whose sum is σ = 42523880. Its totient is φ = 42523878.

The previous prime is 42523823. The next prime is 42523913. The reversal of 42523879 is 97832524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42523879 - 2¹⁷ = 42392807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42523079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21261939 + 21261940.

It is an arithmetic number, because the mean of its divisors is an integer number (21261940).

Almost surely, 2^42523879 is an apocalyptic number.

42523879 is a deficient number, since it is larger than the sum of its proper divisors (1).

42523879 is an equidigital number, since it uses as much as digits as its factorization.

42523879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 42523879 is about 6521.0335837197. The cubic root of 42523879 is about 349.0419486363.

The spelling of 42523879 in words is "forty-two million, five hundred twenty-three thousand, eight hundred seventy-nine".