28907023597 has 2 divisors, whose sum is σ = 28907023598. Its totient is φ = 28907023596.

The previous prime is 28907023583. The next prime is 28907023657. The reversal of 28907023597 is 79532070982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16664486281 + 12242537316 = 129091^2 + 110646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28907023597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28907023547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14453511798 + 14453511799.

It is an arithmetic number, because the mean of its divisors is an integer number (14453511799).

Almost surely, 2^28907023597 is an apocalyptic number.

It is an amenable number.

28907023597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28907023597 is an equidigital number, since it uses as much as digits as its factorization.

28907023597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 28907023597 in words is "twenty-eight billion, nine hundred seven million, twenty-three thousand, five hundred ninety-seven".