7863881 has 2 divisors, whose sum is σ = 7863882. Its totient is φ = 7863880.

The previous prime is 7863851. The next prime is 7863931. The reversal of 7863881 is 1883687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6150400 + 1713481 = 2480^2 + 1309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7863881 is a prime.

It is a super-3 number, since 3×7863881³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (7863811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3931940 + 3931941.

It is an arithmetic number, because the mean of its divisors is an integer number (3931941).

Almost surely, 2^7863881 is an apocalyptic number.

It is an amenable number.

7863881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7863881 is an equidigital number, since it uses as much as digits as its factorization.

7863881 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 7863881 is about 2804.2612217837. The cubic root of 7863881 is about 198.8591800217.

The spelling of 7863881 in words is "seven million, eight hundred sixty-three thousand, eight hundred eighty-one".