28993513907 has 2 divisors, whose sum is σ = 28993513908. Its totient is φ = 28993513906.

The previous prime is 28993513877. The next prime is 28993513979. The reversal of 28993513907 is 70931539982.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28993513907 - 2³⁴ = 11813644723 is a prime.

It is not a weakly prime, because it can be changed into another prime (28993513607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496756953 + 14496756954.

It is an arithmetic number, because the mean of its divisors is an integer number (14496756954).

Almost surely, 2^28993513907 is an apocalyptic number.

28993513907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28993513907 is an equidigital number, since it uses as much as digits as its factorization.

28993513907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 28993513907 in words is "twenty-eight billion, nine hundred ninety-three million, five hundred thirteen thousand, nine hundred seven".