28307663933 has 2 divisors, whose sum is σ = 28307663934. Its totient is φ = 28307663932.

The previous prime is 28307663903. The next prime is 28307663999. The reversal of 28307663933 is 33936670382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15193520644 + 13114143289 = 123262^2 + 114517^2 .

It is a cyclic number.

It is not a de Polignac number, because 28307663933 - 2⁶ = 28307663869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28307663903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153831966 + 14153831967.

It is an arithmetic number, because the mean of its divisors is an integer number (14153831967).

Almost surely, 2^28307663933 is an apocalyptic number.

It is an amenable number.

28307663933 is a deficient number, since it is larger than the sum of its proper divisors (1).

28307663933 is an equidigital number, since it uses as much as digits as its factorization.

28307663933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 28307663933 in words is "twenty-eight billion, three hundred seven million, six hundred sixty-three thousand, nine hundred thirty-three".