1217477161 has 2 divisors, whose sum is σ = 1217477162. Its totient is φ = 1217477160.

The previous prime is 1217477153. The next prime is 1217477207. The reversal of 1217477161 is 1617747121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940587561 + 276889600 = 30669^2 + 16640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1217477161 - 2³ = 1217477153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1217477161.

It is not a weakly prime, because it can be changed into another prime (1217471161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608738580 + 608738581.

It is an arithmetic number, because the mean of its divisors is an integer number (608738581).

Almost surely, 2^1217477161 is an apocalyptic number.

It is an amenable number.

1217477161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217477161 is an equidigital number, since it uses as much as digits as its factorization.

1217477161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 37.

The square root of 1217477161 is about 34892.3653683725. The cubic root of 1217477161 is about 1067.7926840341.

The spelling of 1217477161 in words is "one billion, two hundred seventeen million, four hundred seventy-seven thousand, one hundred sixty-one".