42689047 has 2 divisors, whose sum is σ = 42689048. Its totient is φ = 42689046.

The previous prime is 42689039. The next prime is 42689051. The reversal of 42689047 is 74098624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42689047 - 2³ = 42689039 is a prime.

It is a super-3 number, since 3×42689047³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42689147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21344523 + 21344524.

It is an arithmetic number, because the mean of its divisors is an integer number (21344524).

Almost surely, 2^42689047 is an apocalyptic number.

42689047 is a deficient number, since it is larger than the sum of its proper divisors (1).

42689047 is an equidigital number, since it uses as much as digits as its factorization.

42689047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 42689047 is about 6533.6855602332. The cubic root of 42689047 is about 349.4932721588.

The spelling of 42689047 in words is "forty-two million, six hundred eighty-nine thousand, forty-seven".