611091 has 16 divisors (see below), whose sum is σ = 975520. Its totient is φ = 375840.

The previous prime is 611081. The next prime is 611101. The reversal of 611091 is 190116.

It is an interprime number because it is at equal distance from previous prime (611081) and next prime (611101).

It is not a de Polignac number, because 611091 - 2⁶ = 611027 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (60970).

2⁶¹¹⁰⁹¹ is an apocalyptic number.

611091 is a deficient number, since it is larger than the sum of its proper divisors (364429).

611091 is a wasteful number, since it uses less digits than its factorization.

611091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 611091 is about 781.7230967549. The cubic root of 611091 is about 84.8597919210.

The spelling of 611091 in words is "six hundred eleven thousand, ninety-one".