42047479 has 2 divisors, whose sum is σ = 42047480. Its totient is φ = 42047478.

The previous prime is 42047459. The next prime is 42047521. The reversal of 42047479 is 97474024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42047479 - 2⁷ = 42047351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42047449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023739 + 21023740.

It is an arithmetic number, because the mean of its divisors is an integer number (21023740).

Almost surely, 2^42047479 is an apocalyptic number.

42047479 is a deficient number, since it is larger than the sum of its proper divisors (1).

42047479 is an equidigital number, since it uses as much as digits as its factorization.

42047479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 42047479 is about 6484.4027481334. The cubic root of 42047479 is about 347.7335979163.

The spelling of 42047479 in words is "forty-two million, forty-seven thousand, four hundred seventy-nine".