11903861 has 4 divisors (see below), whose sum is σ = 12530400. Its totient is φ = 11277324.

The previous prime is 11903849. The next prime is 11903867. The reversal of 11903861 is 16830911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11903861 - 2⁶ = 11903797 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 (11903867) 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, 313241 + ... + 313278.

It is an arithmetic number, because the mean of its divisors is an integer number (3132600).

Almost surely, 2^11903861 is an apocalyptic number.

It is an amenable number.

11903861 is a deficient number, since it is larger than the sum of its proper divisors (626539).

11903861 is an equidigital number, since it uses as much as digits as its factorization.

11903861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626538.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 11903861 is about 3450.1972407386. The cubic root of 11903861 is about 228.3298102120.

The spelling of 11903861 in words is "eleven million, nine hundred three thousand, eight hundred sixty-one".