28073393947 has 2 divisors, whose sum is σ = 28073393948. Its totient is φ = 28073393946.

The previous prime is 28073393939. The next prime is 28073393963. The reversal of 28073393947 is 74939337082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28073393947 - 2³ = 28073393939 is a prime.

It is not a weakly prime, because it can be changed into another prime (28073333947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036696973 + 14036696974.

It is an arithmetic number, because the mean of its divisors is an integer number (14036696974).

Almost surely, 2^28073393947 is an apocalyptic number.

28073393947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28073393947 is an equidigital number, since it uses as much as digits as its factorization.

28073393947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6858432, while the sum is 55.

The spelling of 28073393947 in words is "twenty-eight billion, seventy-three million, three hundred ninety-three thousand, nine hundred forty-seven".