11655397 has 8 divisors (see below), whose sum is σ = 12580344. Its totient is φ = 10734528.

The previous prime is 11655373. The next prime is 11655409. The reversal of 11655397 is 79355611.

It is a Cunningham number, because it is equal to 3414²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1726596 + 9928801 = 1314^2 + 3151^2 .

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 11655397 - 2⁷ = 11655269 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 (11655317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7803 + ... + 9175.

It is an arithmetic number, because the mean of its divisors is an integer number (1572543).

Almost surely, 2^11655397 is an apocalyptic number.

It is an amenable number.

11655397 is a deficient number, since it is larger than the sum of its proper divisors (924947).

11655397 is a wasteful number, since it uses less digits than its factorization.

11655397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039.

The product of its digits is 28350, while the sum is 37.

The square root of 11655397 is about 3414.0001464558. Note that the first 3 decimals coincide. The cubic root of 11655397 is about 226.7300185760.

The spelling of 11655397 in words is "eleven million, six hundred fifty-five thousand, three hundred ninety-seven".