28513679 has 2 divisors, whose sum is σ = 28513680. Its totient is φ = 28513678.

The previous prime is 28513669. The next prime is 28513691. The reversal of 28513679 is 97631582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28513679 - 2⁴ = 28513663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28513669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256839 + 14256840.

It is an arithmetic number, because the mean of its divisors is an integer number (14256840).

Almost surely, 2^28513679 is an apocalyptic number.

28513679 is a deficient number, since it is larger than the sum of its proper divisors (1).

28513679 is an equidigital number, since it uses as much as digits as its factorization.

28513679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 28513679 is about 5339.8201280567. The cubic root of 28513679 is about 305.5045987434.

It can be divided in two parts, 28513 and 679, that added together give a palindrome (29192).

The spelling of 28513679 in words is "twenty-eight million, five hundred thirteen thousand, six hundred seventy-nine".