1216300069 has 2 divisors, whose sum is σ = 1216300070. Its totient is φ = 1216300068.

The previous prime is 1216300061. The next prime is 1216300081. The reversal of 1216300069 is 9600036121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736471044 + 479829025 = 27138^2 + 21905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216300069 - 2³ = 1216300061 is a prime.

It is a super-2 number, since 2×1216300069² = 2958771715698809522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216300061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608150034 + 608150035.

It is an arithmetic number, because the mean of its divisors is an integer number (608150035).

Almost surely, 2^1216300069 is an apocalyptic number.

It is an amenable number.

1216300069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216300069 is an equidigital number, since it uses as much as digits as its factorization.

1216300069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1216300069 is about 34875.4938172924. The cubic root of 1216300069 is about 1067.4484488266.

The spelling of 1216300069 in words is "one billion, two hundred sixteen million, three hundred thousand, sixty-nine".