13611901 has 4 divisors (see below), whose sum is σ = 13658652. Its totient is φ = 13565152.

The previous prime is 13611887. The next prime is 13611919. The reversal of 13611901 is 10911631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10911631 = 283 ⋅38557.

It can be written as a sum of positive squares in 2 ways, for example, as 12243001 + 1368900 = 3499^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 13611901 - 2⁵ = 13611869 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 (13611971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22936 + ... + 23521.

It is an arithmetic number, because the mean of its divisors is an integer number (3414663).

Almost surely, 2^13611901 is an apocalyptic number.

It is an amenable number.

13611901 is a deficient number, since it is larger than the sum of its proper divisors (46751).

13611901 is an equidigital number, since it uses as much as digits as its factorization.

13611901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46750.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 13611901 is about 3689.4309859381. The cubic root of 13611901 is about 238.7662437894.

The spelling of 13611901 in words is "thirteen million, six hundred eleven thousand, nine hundred one".