69840047 has 2 divisors, whose sum is σ = 69840048. Its totient is φ = 69840046.

The previous prime is 69840031. The next prime is 69840083. The reversal of 69840047 is 74004896.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69840047 - 2⁴ = 69840031 is a 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 (69840647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34920023 + 34920024.

It is an arithmetic number, because the mean of its divisors is an integer number (34920024).

Almost surely, 2^69840047 is an apocalyptic number.

69840047 is a deficient number, since it is larger than the sum of its proper divisors (1).

69840047 is an equidigital number, since it uses as much as digits as its factorization.

69840047 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 38.

The square root of 69840047 is about 8357.0357783128. The cubic root of 69840047 is about 411.8143801260.

The spelling of 69840047 in words is "sixty-nine million, eight hundred forty thousand, forty-seven".