28013723 has 2 divisors, whose sum is σ = 28013724. Its totient is φ = 28013722.

The previous prime is 28013719. The next prime is 28013737. The reversal of 28013723 is 32731082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28013723 - 2² = 28013719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28013692 and 28013701.

It is not a weakly prime, because it can be changed into another prime (28013743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14006861 + 14006862.

It is an arithmetic number, because the mean of its divisors is an integer number (14006862).

Almost surely, 2^28013723 is an apocalyptic number.

28013723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28013723 is an equidigital number, since it uses as much as digits as its factorization.

28013723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 28013723 is about 5292.7991649032. The cubic root of 28013723 is about 303.7084975501.

The spelling of 28013723 in words is "twenty-eight million, thirteen thousand, seven hundred twenty-three".