1097437897 has 2 divisors, whose sum is σ = 1097437898. Its totient is φ = 1097437896.

The previous prime is 1097437877. The next prime is 1097437927. The reversal of 1097437897 is 7987347901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089264016 + 8173881 = 33004^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097437897 - 2²⁷ = 963220169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1097437867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548718948 + 548718949.

It is an arithmetic number, because the mean of its divisors is an integer number (548718949).

Almost surely, 2^1097437897 is an apocalyptic number.

It is an amenable number.

1097437897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097437897 is an equidigital number, since it uses as much as digits as its factorization.

1097437897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The square root of 1097437897 is about 33127.6002300197. The cubic root of 1097437897 is about 1031.4780354390.

The spelling of 1097437897 in words is "one billion, ninety-seven million, four hundred thirty-seven thousand, eight hundred ninety-seven".