42389047 has 2 divisors, whose sum is σ = 42389048. Its totient is φ = 42389046.

The previous prime is 42389021. The next prime is 42389063. The reversal of 42389047 is 74098324.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42389047 - 2⁷ = 42388919 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42388997 and 42389015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42389077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194523 + 21194524.

It is an arithmetic number, because the mean of its divisors is an integer number (21194524).

Almost surely, 2^42389047 is an apocalyptic number.

42389047 is a deficient number, since it is larger than the sum of its proper divisors (1).

42389047 is an equidigital number, since it uses as much as digits as its factorization.

42389047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42389047 is about 6510.6871373151. The cubic root of 42389047 is about 348.6726514057.

The spelling of 42389047 in words is "forty-two million, three hundred eighty-nine thousand, forty-seven".