28870611966997 has 2 divisors, whose sum is σ = 28870611966998. Its totient is φ = 28870611966996.

The previous prime is 28870611966953. The next prime is 28870611967061. The reversal of 28870611966997 is 79966911607882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16176170285521 + 12694441681476 = 4021961^2 + 3562926^2 .

It is a cyclic number.

It is not a de Polignac number, because 28870611966997 - 2¹¹ = 28870611964949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28870611966697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435305983498 + 14435305983499.

It is an arithmetic number, because the mean of its divisors is an integer number (14435305983499).

Almost surely, 2^{28870611966997} is an apocalyptic number.

It is an amenable number.

28870611966997 is a deficient number, since it is larger than the sum of its proper divisors (1).

28870611966997 is an equidigital number, since it uses as much as digits as its factorization.

28870611966997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987614208, while the sum is 79.

The spelling of 28870611966997 in words is "twenty-eight trillion, eight hundred seventy billion, six hundred eleven million, nine hundred sixty-six thousand, nine hundred ninety-seven".