1216650341 has 2 divisors, whose sum is σ = 1216650342. Its totient is φ = 1216650340.

The previous prime is 1216650329. The next prime is 1216650371. The reversal of 1216650341 is 1430566121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757405441 + 459244900 = 27521^2 + 21430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216650341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216650301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608325170 + 608325171.

It is an arithmetic number, because the mean of its divisors is an integer number (608325171).

Almost surely, 2^1216650341 is an apocalyptic number.

It is an amenable number.

1216650341 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216650341 is an equidigital number, since it uses as much as digits as its factorization.

1216650341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1216650341 is about 34880.5152054840. The cubic root of 1216650341 is about 1067.5509074842.

The spelling of 1216650341 in words is "one billion, two hundred sixteen million, six hundred fifty thousand, three hundred forty-one".