28913936507 has 2 divisors, whose sum is σ = 28913936508.
Its totient is φ = 28913936506.
The previous prime is 28913936501. The next prime is 28913936509. The reversal of 28913936507 is 70563931982.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-28913936507 is a prime.
It is a super-2 number, since 2×289139365072 (a number of 22 digits) contains 22 as substring.
Together with 28913936509, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (28913936501) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14456968253 + 14456968254.
It is an arithmetic number, because the mean of its divisors is an integer number (14456968254).
Almost surely, 228913936507 is an apocalyptic number.
28913936507 is a deficient number, since it is larger than the sum of its proper divisors (1).
28913936507 is an equidigital number, since it uses as much as digits as its factorization.
28913936507 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 2449440, while the sum is 53.
The spelling of 28913936507 in words is "twenty-eight billion, nine hundred thirteen million, nine hundred thirty-six thousand, five hundred seven".