28347047 has 2 divisors, whose sum is σ = 28347048. Its totient is φ = 28347046.

The previous prime is 28347043. The next prime is 28347083. The reversal of 28347047 is 74074382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28347047 - 2² = 28347043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28346998 and 28347016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28347043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173523 + 14173524.

It is an arithmetic number, because the mean of its divisors is an integer number (14173524).

Almost surely, 2^28347047 is an apocalyptic number.

28347047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347047 is an equidigital number, since it uses as much as digits as its factorization.

28347047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 28347047 is about 5324.1944930665. The cubic root of 28347047 is about 304.9083196629.

The spelling of 28347047 in words is "twenty-eight million, three hundred forty-seven thousand, forty-seven".