11957603 has 4 divisors (see below), whose sum is σ = 13665840. Its totient is φ = 10249368.

The previous prime is 11957573. The next prime is 11957611. The reversal of 11957603 is 30675911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11957603 - 2⁸ = 11957347 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 11957603.

It is not an unprimeable number, because it can be changed into a prime (11957633) 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, 854108 + ... + 854121.

It is an arithmetic number, because the mean of its divisors is an integer number (3416460).

Almost surely, 2^11957603 is an apocalyptic number.

11957603 is a deficient number, since it is larger than the sum of its proper divisors (1708237).

11957603 is an equidigital number, since it uses as much as digits as its factorization.

11957603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708236.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 11957603 is about 3457.9767205694. The cubic root of 11957603 is about 228.6729056296.

The spelling of 11957603 in words is "eleven million, nine hundred fifty-seven thousand, six hundred three".