1216936807 has 2 divisors, whose sum is σ = 1216936808. Its totient is φ = 1216936806.

The previous prime is 1216936781. The next prime is 1216936811. The reversal of 1216936807 is 7086396121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1216936807 - 2²³ = 1208548199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216936307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608468403 + 608468404.

It is an arithmetic number, because the mean of its divisors is an integer number (608468404).

Almost surely, 2^1216936807 is an apocalyptic number.

1216936807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216936807 is an equidigital number, since it uses as much as digits as its factorization.

1216936807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1216936807 is about 34884.6213538287. The cubic root of 1216936807 is about 1067.6346875233.

The spelling of 1216936807 in words is "one billion, two hundred sixteen million, nine hundred thirty-six thousand, eight hundred seven".