1197690761 has 2 divisors, whose sum is σ = 1197690762. Its totient is φ = 1197690760.

The previous prime is 1197690713. The next prime is 1197690763. The reversal of 1197690761 is 1670967911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699285136 + 498405625 = 26444^2 + 22325^2 .

It is an emirp because it is prime and its reverse (1670967911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1197690761 is a prime.

It is a Sophie Germain prime.

Together with 1197690763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1197690763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598845380 + 598845381.

It is an arithmetic number, because the mean of its divisors is an integer number (598845381).

Almost surely, 2^1197690761 is an apocalyptic number.

It is an amenable number.

1197690761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197690761 is an equidigital number, since it uses as much as digits as its factorization.

1197690761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 1197690761 is about 34607.6691067168. The cubic root of 1197690761 is about 1061.9764835202.

The spelling of 1197690761 in words is "one billion, one hundred ninety-seven million, six hundred ninety thousand, seven hundred sixty-one".