28147973207 has 2 divisors, whose sum is σ = 28147973208. Its totient is φ = 28147973206.

The previous prime is 28147973197. The next prime is 28147973279. The reversal of 28147973207 is 70237974182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28147973207 - 2¹² = 28147969111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28147933207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14073986603 + 14073986604.

It is an arithmetic number, because the mean of its divisors is an integer number (14073986604).

Almost surely, 2^28147973207 is an apocalyptic number.

28147973207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28147973207 is an equidigital number, since it uses as much as digits as its factorization.

28147973207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 28147973207 in words is "twenty-eight billion, one hundred forty-seven million, nine hundred seventy-three thousand, two hundred seven".