11901843 has 8 divisors (see below), whose sum is σ = 17632400. Its totient is φ = 7934544.

The previous prime is 11901821. The next prime is 11901899. The reversal of 11901843 is 34810911.

It is not a de Polignac number, because 11901843 - 2⁵ = 11901811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 440809 = 11901843 / (1 + 1 + 9 + 0 + 1 + 8 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11908843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220378 + ... + 220431.

It is an arithmetic number, because the mean of its divisors is an integer number (2204050).

Almost surely, 2^11901843 is an apocalyptic number.

11901843 is a deficient number, since it is larger than the sum of its proper divisors (5730557).

11901843 is an equidigital number, since it uses as much as digits as its factorization.

11901843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440818 (or 440812 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 11901843 is about 3449.9047812947. The cubic root of 11901843 is about 228.3169069588.

The spelling of 11901843 in words is "eleven million, nine hundred one thousand, eight hundred forty-three".