11605997 has 12 divisors (see below), whose sum is σ = 12928860. Its totient is φ = 10356480.

The previous prime is 11605987. The next prime is 11606009. The reversal of 11605997 is 79950611.

It can be written as a sum of positive squares in 2 ways, for example, as 808201 + 10797796 = 899^2 + 3286^2 .

It is not a de Polignac number, because 11605997 - 2⁴ = 11605981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11605997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11605907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12029 + ... + 12957.

It is an arithmetic number, because the mean of its divisors is an integer number (1077405).

Almost surely, 2^11605997 is an apocalyptic number.

It is an amenable number.

11605997 is a deficient number, since it is larger than the sum of its proper divisors (1322863).

11605997 is an equidigital number, since it uses as much as digits as its factorization.

11605997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 11605997 is about 3406.7575493422. The cubic root of 11605997 is about 226.4092423090.

The spelling of 11605997 in words is "eleven million, six hundred five thousand, nine hundred ninety-seven".