3120730381 has 2 divisors, whose sum is σ = 3120730382. Its totient is φ = 3120730380.

The previous prime is 3120730357. The next prime is 3120730447. The reversal of 3120730381 is 1830370213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2973957156 + 146773225 = 54534^2 + 12115^2 .

It is a cyclic number.

It is not a de Polignac number, because 3120730381 - 2⁷ = 3120730253 is a prime.

It is a super-2 number, since 2×3120730381² = 19477916221792810322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3120730181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560365190 + 1560365191.

It is an arithmetic number, because the mean of its divisors is an integer number (1560365191).

Almost surely, 2^3120730381 is an apocalyptic number.

It is an amenable number.

3120730381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3120730381 is an equidigital number, since it uses as much as digits as its factorization.

3120730381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 3120730381 is about 55863.4977512150. The cubic root of 3120730381 is about 1461.3427287464.

The spelling of 3120730381 in words is "three billion, one hundred twenty million, seven hundred thirty thousand, three hundred eighty-one".