28591793 has 2 divisors, whose sum is σ = 28591794. Its totient is φ = 28591792.

The previous prime is 28591753. The next prime is 28591799. The reversal of 28591793 is 39719582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27962944 + 628849 = 5288^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 28591793 - 2¹⁰ = 28590769 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28591799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14295896 + 14295897.

It is an arithmetic number, because the mean of its divisors is an integer number (14295897).

Almost surely, 2^28591793 is an apocalyptic number.

It is an amenable number.

28591793 is a deficient number, since it is larger than the sum of its proper divisors (1).

28591793 is an equidigital number, since it uses as much as digits as its factorization.

28591793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 28591793 is about 5347.1294167993. The cubic root of 28591793 is about 305.7833237621.

The spelling of 28591793 in words is "twenty-eight million, five hundred ninety-one thousand, seven hundred ninety-three".