1197947897 has 8 divisors (see below), whose sum is σ = 1202482176. Its totient is φ = 1193422032.

The previous prime is 1197947869. The next prime is 1197947899. The reversal of 1197947897 is 7987497911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1197947897 - 2⁶ = 1197947833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197947899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444488 + ... + 447174.

It is an arithmetic number, because the mean of its divisors is an integer number (150310272).

Almost surely, 2^1197947897 is an apocalyptic number.

It is an amenable number.

1197947897 is a deficient number, since it is larger than the sum of its proper divisors (4534279).

1197947897 is a wasteful number, since it uses less digits than its factorization.

1197947897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4207.

The product of its digits is 8001504, while the sum is 62.

The square root of 1197947897 is about 34611.3839220566. The cubic root of 1197947897 is about 1062.0524777735.

The spelling of 1197947897 in words is "one billion, one hundred ninety-seven million, nine hundred forty-seven thousand, eight hundred ninety-seven".