28406930947193 has 2 divisors, whose sum is σ = 28406930947194. Its totient is φ = 28406930947192.

The previous prime is 28406930947177. The next prime is 28406930947211. The reversal of 28406930947193 is 39174903960482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27080398277689 + 1326532669504 = 5203883^2 + 1151752^2 .

It is a cyclic number.

It is not a de Polignac number, because 28406930947193 - 2⁴ = 28406930947177 is a prime.

It is not a weakly prime, because it can be changed into another prime (28406930947093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203465473596 + 14203465473597.

It is an arithmetic number, because the mean of its divisors is an integer number (14203465473597).

Almost surely, 2^{28406930947193} is an apocalyptic number.

It is an amenable number.

28406930947193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28406930947193 is an equidigital number, since it uses as much as digits as its factorization.

28406930947193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70543872, while the sum is 65.

The spelling of 28406930947193 in words is "twenty-eight trillion, four hundred six billion, nine hundred thirty million, nine hundred forty-seven thousand, one hundred ninety-three".