7868381 has 2 divisors, whose sum is σ = 7868382. Its totient is φ = 7868380.

The previous prime is 7868363. The next prime is 7868423. The reversal of 7868381 is 1838687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 872356 = 2645^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 7868381 - 2¹⁸ = 7606237 is a prime.

It is a super-2 number, since 2×7868381² = 123822839122322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7888381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934190 + 3934191.

It is an arithmetic number, because the mean of its divisors is an integer number (3934191).

Almost surely, 2^7868381 is an apocalyptic number.

It is an amenable number.

7868381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868381 is an equidigital number, since it uses as much as digits as its factorization.

7868381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 7868381 is about 2805.0634573927. The cubic root of 7868381 is about 198.8971042847.

The spelling of 7868381 in words is "seven million, eight hundred sixty-eight thousand, three hundred eighty-one".