3081240989 has 2 divisors, whose sum is σ = 3081240990. Its totient is φ = 3081240988.

The previous prime is 3081240961. The next prime is 3081241043. The reversal of 3081240989 is 9890421803.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3073815364 + 7425625 = 55442^2 + 2725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3081240989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3081240289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1540620494 + 1540620495.

It is an arithmetic number, because the mean of its divisors is an integer number (1540620495).

Almost surely, 2^3081240989 is an apocalyptic number.

It is an amenable number.

3081240989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3081240989 is an equidigital number, since it uses as much as digits as its factorization.

3081240989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 3081240989 is about 55508.9271108711. The cubic root of 3081240989 is about 1455.1526532561.

The spelling of 3081240989 in words is "three billion, eighty-one million, two hundred forty thousand, nine hundred eighty-nine".