28406930947093 has 2 divisors, whose sum is σ = 28406930947094. Its totient is φ = 28406930947092.

The previous prime is 28406930947061. The next prime is 28406930947127. The reversal of 28406930947093 is 39074903960482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23710491512964 + 4696439434129 = 4869342^2 + 2167127^2 .

It is a cyclic number.

It is not a de Polignac number, because 28406930947093 - 2⁵ = 28406930947061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28406930947193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14203465473546 + 14203465473547.

It is an arithmetic number, because the mean of its divisors is an integer number (14203465473547).

Almost surely, 2^{28406930947093} is an apocalyptic number.

It is an amenable number.

28406930947093 is a deficient number, since it is larger than the sum of its proper divisors (1).

28406930947093 is an equidigital number, since it uses as much as digits as its factorization.

28406930947093 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 64.

The spelling of 28406930947093 in words is "twenty-eight trillion, four hundred six billion, nine hundred thirty million, nine hundred forty-seven thousand, ninety-three".