1461216689 has 2 divisors, whose sum is σ = 1461216690. Its totient is φ = 1461216688.

The previous prime is 1461216629. The next prime is 1461216697. The reversal of 1461216689 is 9866121641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1399358464 + 61858225 = 37408^2 + 7865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1461216689 - 2²⁰ = 1460168113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1461216629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730608344 + 730608345.

It is an arithmetic number, because the mean of its divisors is an integer number (730608345).

Almost surely, 2^1461216689 is an apocalyptic number.

It is an amenable number.

1461216689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461216689 is an equidigital number, since it uses as much as digits as its factorization.

1461216689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 1461216689 is about 38225.8641367334. The cubic root of 1461216689 is about 1134.7622365461.

The spelling of 1461216689 in words is "one billion, four hundred sixty-one million, two hundred sixteen thousand, six hundred eighty-nine".