6861091 has 2 divisors, whose sum is σ = 6861092. Its totient is φ = 6861090.

The previous prime is 6861083. The next prime is 6861103. The reversal of 6861091 is 1901686.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6861091 - 2³ = 6861083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6861011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430545 + 3430546.

It is an arithmetic number, because the mean of its divisors is an integer number (3430546).

Almost surely, 2^6861091 is an apocalyptic number.

6861091 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861091 is an equidigital number, since it uses as much as digits as its factorization.

6861091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 6861091 is about 2619.3684353294. The cubic root of 6861091 is about 190.0193055176.

The spelling of 6861091 in words is "six million, eight hundred sixty-one thousand, ninety-one".