1297194947 has 4 divisors (see below), whose sum is σ = 1297469280. Its totient is φ = 1296920616.

The previous prime is 1297194937. The next prime is 1297194953. The reversal of 1297194947 is 7494917921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7494917921 = 523 ⋅14330627.

It is a cyclic number.

It is not a de Polignac number, because 1297194947 - 2²⁴ = 1280417731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297194937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129947 + ... + 139572.

It is an arithmetic number, because the mean of its divisors is an integer number (324367320).

Almost surely, 2^1297194947 is an apocalyptic number.

1297194947 is a deficient number, since it is larger than the sum of its proper divisors (274333).

1297194947 is an equidigital number, since it uses as much as digits as its factorization.

1297194947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274332.

The product of its digits is 1143072, while the sum is 53.

The square root of 1297194947 is about 36016.5926622716. The cubic root of 1297194947 is about 1090.6073396176.

The spelling of 1297194947 in words is "one billion, two hundred ninety-seven million, one hundred ninety-four thousand, nine hundred forty-seven".