1197819671 has 2 divisors, whose sum is σ = 1197819672. Its totient is φ = 1197819670.

The previous prime is 1197819661. The next prime is 1197819673. The reversal of 1197819671 is 1769187911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1197819671 is a prime.

It is a Sophie Germain prime.

Together with 1197819673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1197819673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598909835 + 598909836.

It is an arithmetic number, because the mean of its divisors is an integer number (598909836).

Almost surely, 2^1197819671 is an apocalyptic number.

1197819671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197819671 is an equidigital number, since it uses as much as digits as its factorization.

1197819671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 50.

The square root of 1197819671 is about 34609.5315050637. The cubic root of 1197819671 is about 1062.0145830814.

The spelling of 1197819671 in words is "one billion, one hundred ninety-seven million, eight hundred nineteen thousand, six hundred seventy-one".