3121144409 has 2 divisors, whose sum is σ = 3121144410. Its totient is φ = 3121144408.

The previous prime is 3121144399. The next prime is 3121144441. The reversal of 3121144409 is 9044411213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2393655625 + 727488784 = 48925^2 + 26972^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121144409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121144489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560572204 + 1560572205.

It is an arithmetic number, because the mean of its divisors is an integer number (1560572205).

Almost surely, 2^3121144409 is an apocalyptic number.

It is an amenable number.

3121144409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121144409 is an equidigital number, since it uses as much as digits as its factorization.

3121144409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 3121144409 is about 55867.2033397055. The cubic root of 3121144409 is about 1461.4073514446.

The spelling of 3121144409 in words is "three billion, one hundred twenty-one million, one hundred forty-four thousand, four hundred nine".