11775917 has 8 divisors (see below), whose sum is σ = 12555000. Its totient is φ = 11006464.

The previous prime is 11775899. The next prime is 11775919. The reversal of 11775917 is 71957711.

It can be written as a sum of positive squares in 4 ways, for example, as 4218916 + 7557001 = 2054^2 + 2749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11775917 - 2¹² = 11771821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11775919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209 + ... + 4857.

It is an arithmetic number, because the mean of its divisors is an integer number (1569375).

Almost surely, 2^11775917 is an apocalyptic number.

11775917 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11775917 is a deficient number, since it is larger than the sum of its proper divisors (779083).

11775917 is a wasteful number, since it uses less digits than its factorization.

11775917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

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

The square root of 11775917 is about 3431.6056008813. The cubic root of 11775917 is about 227.5088238738.

The spelling of 11775917 in words is "eleven million, seven hundred seventy-five thousand, nine hundred seventeen".