378802681 has 2 divisors, whose sum is σ = 378802682. Its totient is φ = 378802680.

The previous prime is 378802673. The next prime is 378802693. The reversal of 378802681 is 186208873.

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., 347263225 + 31539456 = 18635^2 + 5616^2 .

It is a cyclic number.

It is not a de Polignac number, because 378802681 - 2³ = 378802673 is a prime.

It is a super-2 number, since 2×378802681² = 286982942265575522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (378802651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189401340 + 189401341.

It is an arithmetic number, because the mean of its divisors is an integer number (189401341).

Almost surely, 2^378802681 is an apocalyptic number.

It is an amenable number.

378802681 is a deficient number, since it is larger than the sum of its proper divisors (1).

378802681 is an equidigital number, since it uses as much as digits as its factorization.

378802681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 378802681 is about 19462.8538760378. The cubic root of 378802681 is about 723.5541098511.

The spelling of 378802681 in words is "three hundred seventy-eight million, eight hundred two thousand, six hundred eighty-one".