7105991 has 2 divisors, whose sum is σ = 7105992. Its totient is φ = 7105990.

The previous prime is 7105933. The next prime is 7105993. The reversal of 7105991 is 1995017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7105991 - 2⁶ = 7105927 is a prime.

Together with 7105993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7105993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3552995 + 3552996.

It is an arithmetic number, because the mean of its divisors is an integer number (3552996).

Almost surely, 2^7105991 is an apocalyptic number.

7105991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7105991 is an equidigital number, since it uses as much as digits as its factorization.

7105991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 7105991 is about 2665.7064729636. The cubic root of 7105991 is about 192.2537786385.

The spelling of 7105991 in words is "seven million, one hundred five thousand, nine hundred ninety-one".