11993901 has 4 divisors (see below), whose sum is σ = 15991872. Its totient is φ = 7995932.

The previous prime is 11993899. The next prime is 11993909. The reversal of 11993901 is 10939911.

11993901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10939911 = 3 ⋅3646637.

It is a cyclic number.

It is not a de Polignac number, because 11993901 - 2¹ = 11993899 is a prime.

It is a super-2 number, since 2×11993901² = 287707322395602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993909) 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, 1998981 + ... + 1998986.

It is an arithmetic number, because the mean of its divisors is an integer number (3997968).

Almost surely, 2^11993901 is an apocalyptic number.

It is an amenable number.

11993901 is a deficient number, since it is larger than the sum of its proper divisors (3997971).

11993901 is an equidigital number, since it uses as much as digits as its factorization.

11993901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997970.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 11993901 is about 3463.2211884314. The cubic root of 11993901 is about 228.9040552034.

The spelling of 11993901 in words is "eleven million, nine hundred ninety-three thousand, nine hundred one".