1216790933 has 2 divisors, whose sum is σ = 1216790934. Its totient is φ = 1216790932.

The previous prime is 1216790881. The next prime is 1216790941. The reversal of 1216790933 is 3390976121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 884348644 + 332442289 = 29738^2 + 18233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216790933 - 2⁸ = 1216790677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216790233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608395466 + 608395467.

It is an arithmetic number, because the mean of its divisors is an integer number (608395467).

Almost surely, 2^1216790933 is an apocalyptic number.

It is an amenable number.

1216790933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216790933 is an equidigital number, since it uses as much as digits as its factorization.

1216790933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 1216790933 is about 34882.5304844703. The cubic root of 1216790933 is about 1067.5920267582.

The spelling of 1216790933 in words is "one billion, two hundred sixteen million, seven hundred ninety thousand, nine hundred thirty-three".