28915197907 has 2 divisors, whose sum is σ = 28915197908. Its totient is φ = 28915197906.

The previous prime is 28915197893. The next prime is 28915197911. The reversal of 28915197907 is 70979151982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28915197907 is a prime.

It is not a weakly prime, because it can be changed into another prime (28915197967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457598953 + 14457598954.

It is an arithmetic number, because the mean of its divisors is an integer number (14457598954).

Almost surely, 2^28915197907 is an apocalyptic number.

28915197907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28915197907 is an equidigital number, since it uses as much as digits as its factorization.

28915197907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 58.

The spelling of 28915197907 in words is "twenty-eight billion, nine hundred fifteen million, one hundred ninety-seven thousand, nine hundred seven".