7868999 has 2 divisors, whose sum is σ = 7869000. Its totient is φ = 7868998.

The previous prime is 7868969. The next prime is 7869023. The reversal of 7868999 is 9998687.

7868999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7868999 - 2¹² = 7864903 is a prime.

It is a super-2 number, since 2×7868999² = 123842290524002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7868969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934499 + 3934500.

It is an arithmetic number, because the mean of its divisors is an integer number (3934500).

Almost surely, 2^7868999 is an apocalyptic number.

7868999 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868999 is an equidigital number, since it uses as much as digits as its factorization.

7868999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 56.

The square root of 7868999 is about 2805.1736131655. The cubic root of 7868999 is about 198.9023114208.

The spelling of 7868999 in words is "seven million, eight hundred sixty-eight thousand, nine hundred ninety-nine".