13905973 has 4 divisors (see below), whose sum is σ = 13983840. Its totient is φ = 13828108.

The previous prime is 13905959. The next prime is 13906001. The reversal of 13905973 is 37950931.

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: 37950931 = 2153 ⋅17627.

It is not a de Polignac number, because 13905973 - 2⁹ = 13905461 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 (13905943) 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, 38665 + ... + 39022.

It is an arithmetic number, because the mean of its divisors is an integer number (3495960).

Almost surely, 2^13905973 is an apocalyptic number.

It is an amenable number.

13905973 is a deficient number, since it is larger than the sum of its proper divisors (77867).

13905973 is an equidigital number, since it uses as much as digits as its factorization.

13905973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77866.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 13905973 is about 3729.0713321147. The cubic root of 13905973 is about 240.4734462091.

It can be divided in two parts, 13905 and 973, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 13905973 in words is "thirteen million, nine hundred five thousand, nine hundred seventy-three".