1197647131 has 4 divisors (see below), whose sum is σ = 1198412992. Its totient is φ = 1196881272.

The previous prime is 1197647123. The next prime is 1197647153. The reversal of 1197647131 is 1317467911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1317467911 = 79 ⋅16676809.

It is a cyclic number.

It is not a de Polignac number, because 1197647131 - 2³ = 1197647123 is a prime.

It is a super-2 number, since 2×1197647131² = 2868717300785062322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197644131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380580 + ... + 383713.

It is an arithmetic number, because the mean of its divisors is an integer number (299603248).

Almost surely, 2^1197647131 is an apocalyptic number.

1197647131 is a deficient number, since it is larger than the sum of its proper divisors (765861).

1197647131 is an equidigital number, since it uses as much as digits as its factorization.

1197647131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765860.

The product of its digits is 31752, while the sum is 40.

The square root of 1197647131 is about 34607.0387493643. The cubic root of 1197647131 is about 1061.9635879832.

The spelling of 1197647131 in words is "one billion, one hundred ninety-seven million, six hundred forty-seven thousand, one hundred thirty-one".