28253921723 has 2 divisors, whose sum is σ = 28253921724. Its totient is φ = 28253921722.

The previous prime is 28253921687. The next prime is 28253921743. The reversal of 28253921723 is 32712935282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28253921723 - 2⁶ = 28253921659 is a prime.

It is a super-2 number, since 2×28253921723² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28253921743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126960861 + 14126960862.

It is an arithmetic number, because the mean of its divisors is an integer number (14126960862).

Almost surely, 2^28253921723 is an apocalyptic number.

28253921723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28253921723 is an equidigital number, since it uses as much as digits as its factorization.

28253921723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The spelling of 28253921723 in words is "twenty-eight billion, two hundred fifty-three million, nine hundred twenty-one thousand, seven hundred twenty-three".