7655891 has 2 divisors, whose sum is σ = 7655892. Its totient is φ = 7655890.

The previous prime is 7655881. The next prime is 7655897. The reversal of 7655891 is 1985567.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7655891 is a prime.

It is a super-2 number, since 2×7655891² = 117225334007762, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7655897) 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, 3827945 + 3827946.

It is an arithmetic number, because the mean of its divisors is an integer number (3827946).

Almost surely, 2^7655891 is an apocalyptic number.

7655891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7655891 is an equidigital number, since it uses as much as digits as its factorization.

7655891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 7655891 is about 2766.9280800194. The cubic root of 7655891 is about 197.0902984734.

The spelling of 7655891 in words is "seven million, six hundred fifty-five thousand, eight hundred ninety-one".