11903897 has 4 divisors (see below), whose sum is σ = 11979876. Its totient is φ = 11827920.

The previous prime is 11903887. The next prime is 11903909. The reversal of 11903897 is 79830911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8649481 + 3254416 = 2941^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 11903897 - 2¹⁶ = 11838361 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 11903897.

It is not an unprimeable number, because it can be changed into a prime (11903867) 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, 37754 + ... + 38067.

It is an arithmetic number, because the mean of its divisors is an integer number (2994969).

Almost surely, 2^11903897 is an apocalyptic number.

It is an amenable number.

11903897 is a deficient number, since it is larger than the sum of its proper divisors (75979).

11903897 is an equidigital number, since it uses as much as digits as its factorization.

11903897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75978.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 11903897 is about 3450.2024578277. The cubic root of 11903897 is about 228.3300403856.

The spelling of 11903897 in words is "eleven million, nine hundred three thousand, eight hundred ninety-seven".