7688487091 has 2 divisors, whose sum is σ = 7688487092. Its totient is φ = 7688487090.

The previous prime is 7688487061. The next prime is 7688487109. The reversal of 7688487091 is 1907848867.

Together with next prime (7688487109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1907848867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7688487091 - 2¹⁹ = 7687962803 is a prime.

It is a super-2 number, since 2×7688487091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7688487011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844243545 + 3844243546.

It is an arithmetic number, because the mean of its divisors is an integer number (3844243546).

Almost surely, 2^7688487091 is an apocalyptic number.

7688487091 is a deficient number, since it is larger than the sum of its proper divisors (1).

7688487091 is an equidigital number, since it uses as much as digits as its factorization.

7688487091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The square root of 7688487091 is about 87684.0184469211. The cubic root of 7688487091 is about 1973.6961615765.

The spelling of 7688487091 in words is "seven billion, six hundred eighty-eight million, four hundred eighty-seven thousand, ninety-one".