997280899 has 2 divisors, whose sum is σ = 997280900. Its totient is φ = 997280898.

The previous prime is 997280857. The next prime is 997280909. The reversal of 997280899 is 998082799.

997280899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997280899 - 2⁹ = 997280387 is a prime.

It is not a weakly prime, because it can be changed into another prime (997280849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498640449 + 498640450.

It is an arithmetic number, because the mean of its divisors is an integer number (498640450).

Almost surely, 2^997280899 is an apocalyptic number.

997280899 is a deficient number, since it is larger than the sum of its proper divisors (1).

997280899 is an equidigital number, since it uses as much as digits as its factorization.

997280899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 61.

The square root of 997280899 is about 31579.7545747271. The cubic root of 997280899 is about 999.0928102556.

The spelling of 997280899 in words is "nine hundred ninety-seven million, two hundred eighty thousand, eight hundred ninety-nine".