28423613 has 2 divisors, whose sum is σ = 28423614. Its totient is φ = 28423612.

The previous prime is 28423583. The next prime is 28423627. The reversal of 28423613 is 31632482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 2393209 = 5102^2 + 1547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28423613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28423313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14211806 + 14211807.

It is an arithmetic number, because the mean of its divisors is an integer number (14211807).

Almost surely, 2^28423613 is an apocalyptic number.

It is an amenable number.

28423613 is a deficient number, since it is larger than the sum of its proper divisors (1).

28423613 is an equidigital number, since it uses as much as digits as its factorization.

28423613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 28423613 is about 5331.3800277227. The cubic root of 28423613 is about 305.1825942389.

The spelling of 28423613 in words is "twenty-eight million, four hundred twenty-three thousand, six hundred thirteen".