1216880923 has 2 divisors, whose sum is σ = 1216880924. Its totient is φ = 1216880922.

The previous prime is 1216880879. The next prime is 1216880939. The reversal of 1216880923 is 3290886121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3290886121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216880923 - 2²¹ = 1214783771 is a prime.

It is a super-2 number, since 2×1216880923² = 2961598361522663858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1216880983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608440461 + 608440462.

It is an arithmetic number, because the mean of its divisors is an integer number (608440462).

Almost surely, 2^1216880923 is an apocalyptic number.

1216880923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216880923 is an equidigital number, since it uses as much as digits as its factorization.

1216880923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1216880923 is about 34883.8203613079. The cubic root of 1216880923 is about 1067.6183446834.

The spelling of 1216880923 in words is "one billion, two hundred sixteen million, eight hundred eighty thousand, nine hundred twenty-three".