997895129249 has 2 divisors, whose sum is σ = 997895129250. Its totient is φ = 997895129248.

The previous prime is 997895129233. The next prime is 997895129269. The reversal of 997895129249 is 942921598799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657810213025 + 340084916224 = 811055^2 + 583168^2 .

It is a cyclic number.

It is not a de Polignac number, because 997895129249 - 2⁴ = 997895129233 is a prime.

It is not a weakly prime, because it can be changed into another prime (997895129269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498947564624 + 498947564625.

It is an arithmetic number, because the mean of its divisors is an integer number (498947564625).

Almost surely, 2^997895129249 is an apocalyptic number.

It is an amenable number.

997895129249 is a deficient number, since it is larger than the sum of its proper divisors (1).

997895129249 is an equidigital number, since it uses as much as digits as its factorization.

997895129249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264539520, while the sum is 74.

The spelling of 997895129249 in words is "nine hundred ninety-seven billion, eight hundred ninety-five million, one hundred twenty-nine thousand, two hundred forty-nine".