7868491 has 2 divisors, whose sum is σ = 7868492. Its totient is φ = 7868490.

The previous prime is 7868477. The next prime is 7868503. The reversal of 7868491 is 1948687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7868491 - 2⁷ = 7868363 is a prime.

It is not a weakly prime, because it can be changed into another prime (7868431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934245 + 3934246.

It is an arithmetic number, because the mean of its divisors is an integer number (3934246).

Almost surely, 2^7868491 is an apocalyptic number.

7868491 is a deficient number, since it is larger than the sum of its proper divisors (1).

7868491 is an equidigital number, since it uses as much as digits as its factorization.

7868491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 7868491 is about 2805.0830647238. The cubic root of 7868491 is about 198.8980311412.

The spelling of 7868491 in words is "seven million, eight hundred sixty-eight thousand, four hundred ninety-one".