1197871297 has 6 divisors (see below), whose sum is σ = 1393442178. Its totient is φ = 1026746784.

The previous prime is 1197871273. The next prime is 1197871307. The reversal of 1197871297 is 7921787911.

It can be written as a sum of positive squares in only one way, i.e., 1033236736 + 164634561 = 32144^2 + 12831^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1197871297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197871097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12223128 + ... + 12223225.

It is an arithmetic number, because the mean of its divisors is an integer number (232240363).

Almost surely, 2^1197871297 is an apocalyptic number.

It is an amenable number.

1197871297 is a deficient number, since it is larger than the sum of its proper divisors (195570881).

1197871297 is an equidigital number, since it uses as much as digits as its factorization.

1197871297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24446367 (or 24446360 counting only the distinct ones).

The product of its digits is 444528, while the sum is 52.

The square root of 1197871297 is about 34610.2773320296. The cubic root of 1197871297 is about 1062.0298404635.

The spelling of 1197871297 in words is "one billion, one hundred ninety-seven million, eight hundred seventy-one thousand, two hundred ninety-seven".