11897623 has 4 divisors (see below), whose sum is σ = 12092728. Its totient is φ = 11702520.

The previous prime is 11897597. The next prime is 11897653. The reversal of 11897623 is 32679811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32679811 = 4987 ⋅6553.

It is a cyclic number.

It is not a de Polignac number, because 11897623 - 2¹³ = 11889431 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 (11897653) 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 3 ways as a sum of consecutive naturals, for example, 97461 + ... + 97582.

It is an arithmetic number, because the mean of its divisors is an integer number (3023182).

Almost surely, 2^11897623 is an apocalyptic number.

11897623 is a deficient number, since it is larger than the sum of its proper divisors (195105).

11897623 is an equidigital number, since it uses as much as digits as its factorization.

11897623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195104.

The product of its digits is 18144, while the sum is 37.

The square root of 11897623 is about 3449.2931159877. The cubic root of 11897623 is about 228.2899192269.

The spelling of 11897623 in words is "eleven million, eight hundred ninety-seven thousand, six hundred twenty-three".