11571797 has 4 divisors (see below), whose sum is σ = 11638860. Its totient is φ = 11504736.

The previous prime is 11571757. The next prime is 11571803. The reversal of 11571797 is 79717511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79717511 = 1297 ⋅61463.

It can be written as a sum of positive squares in 2 ways, for example, as 8059921 + 3511876 = 2839^2 + 1874^2 .

It is a cyclic number.

It is not a de Polignac number, because 11571797 - 2⁶ = 11571733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11571797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11571727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33272 + ... + 33617.

It is an arithmetic number, because the mean of its divisors is an integer number (2909715).

Almost surely, 2^11571797 is an apocalyptic number.

It is an amenable number.

11571797 is a deficient number, since it is larger than the sum of its proper divisors (67063).

11571797 is an equidigital number, since it uses as much as digits as its factorization.

11571797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67062.

The product of its digits is 15435, while the sum is 38.

The square root of 11571797 is about 3401.7344105618. The cubic root of 11571797 is about 226.1866328447.

The spelling of 11571797 in words is "eleven million, five hundred seventy-one thousand, seven hundred ninety-seven".