380956813 has 2 divisors, whose sum is σ = 380956814. Its totient is φ = 380956812.

The previous prime is 380956801. The next prime is 380956831. The reversal of 380956813 is 318659083.

Together with next prime (380956831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380952324 + 4489 = 19518^2 + 67^2 .

It is an emirp because it is prime and its reverse (318659083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380956813 - 2⁵ = 380956781 is a prime.

It is a super-2 number, since 2×380956813² = 290256186742233938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 380956813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380956313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190478406 + 190478407.

It is an arithmetic number, because the mean of its divisors is an integer number (190478407).

Almost surely, 2^380956813 is an apocalyptic number.

It is an amenable number.

380956813 is a deficient number, since it is larger than the sum of its proper divisors (1).

380956813 is an equidigital number, since it uses as much as digits as its factorization.

380956813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 380956813 is about 19518.1149960748. The cubic root of 380956813 is about 724.9230599286.

The spelling of 380956813 in words is "three hundred eighty million, nine hundred fifty-six thousand, eight hundred thirteen".