42678479 has 2 divisors, whose sum is σ = 42678480. Its totient is φ = 42678478.

The previous prime is 42678473. The next prime is 42678487. The reversal of 42678479 is 97487624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42678479 - 2⁴ = 42678463 is a prime.

It is a Sophie Germain 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 (42678473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21339239 + 21339240.

It is an arithmetic number, because the mean of its divisors is an integer number (21339240).

Almost surely, 2^42678479 is an apocalyptic number.

42678479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42678479 is an equidigital number, since it uses as much as digits as its factorization.

42678479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The square root of 42678479 is about 6532.8767782655. The cubic root of 42678479 is about 349.4644298680.

The spelling of 42678479 in words is "forty-two million, six hundred seventy-eight thousand, four hundred seventy-nine".