28243103947 has 2 divisors, whose sum is σ = 28243103948. Its totient is φ = 28243103946.

The previous prime is 28243103893. The next prime is 28243103951. The reversal of 28243103947 is 74930134282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28243103947 - 2²⁷ = 28108886219 is a prime.

It is a super-3 number, since 3×28243103947³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (28243103957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121551973 + 14121551974.

It is an arithmetic number, because the mean of its divisors is an integer number (14121551974).

Almost surely, 2^28243103947 is an apocalyptic number.

28243103947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28243103947 is an equidigital number, since it uses as much as digits as its factorization.

28243103947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 28243103947 in words is "twenty-eight billion, two hundred forty-three million, one hundred three thousand, nine hundred forty-seven".