3111320987 has 2 divisors, whose sum is σ = 3111320988. Its totient is φ = 3111320986.

The previous prime is 3111320963. The next prime is 3111321013. The reversal of 3111320987 is 7890231113.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7890231113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3111320987 - 2²⁰ = 3110272411 is a prime.

It is not a weakly prime, because it can be changed into another prime (3111320587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555660493 + 1555660494.

It is an arithmetic number, because the mean of its divisors is an integer number (1555660494).

Almost surely, 2^3111320987 is an apocalyptic number.

3111320987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111320987 is an equidigital number, since it uses as much as digits as its factorization.

3111320987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 3111320987 is about 55779.2164430444. The cubic root of 3111320987 is about 1459.8725395390.

The spelling of 3111320987 in words is "three billion, one hundred eleven million, three hundred twenty thousand, nine hundred eighty-seven".