2629078381 has 2 divisors, whose sum is σ = 2629078382. Its totient is φ = 2629078380.

The previous prime is 2629078363. The next prime is 2629078421. The reversal of 2629078381 is 1838709262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2317555881 + 311522500 = 48141^2 + 17650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2629078381 is a prime.

It is a super-2 number, since 2×2629078381² = 13824106266883162322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2629078321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314539190 + 1314539191.

It is an arithmetic number, because the mean of its divisors is an integer number (1314539191).

Almost surely, 2^2629078381 is an apocalyptic number.

It is an amenable number.

2629078381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2629078381 is an equidigital number, since it uses as much as digits as its factorization.

2629078381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 2629078381 is about 51274.5393055852. The cubic root of 2629078381 is about 1380.1761276636.

The spelling of 2629078381 in words is "two billion, six hundred twenty-nine million, seventy-eight thousand, three hundred eighty-one".