1197644131 has 2 divisors, whose sum is σ = 1197644132. Its totient is φ = 1197644130.

The previous prime is 1197644099. The next prime is 1197644137. The reversal of 1197644131 is 1314467911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1197644131 - 2⁵ = 1197644099 is a prime.

It is a super-2 number, since 2×1197644131² = 2868702929037490322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1197644137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598822065 + 598822066.

It is an arithmetic number, because the mean of its divisors is an integer number (598822066).

Almost surely, 2^1197644131 is an apocalyptic number.

1197644131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197644131 is an equidigital number, since it uses as much as digits as its factorization.

1197644131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 1197644131 is about 34606.9954055535. The cubic root of 1197644131 is about 1061.9627012742.

The spelling of 1197644131 in words is "one billion, one hundred ninety-seven million, six hundred forty-four thousand, one hundred thirty-one".