13555973 has 4 divisors (see below), whose sum is σ = 13564608. Its totient is φ = 13547340.

The previous prime is 13555967. The next prime is 13555981. The reversal of 13555973 is 37955531.

13555973 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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 37955531 = 797 ⋅47623.

It is a cyclic number.

It is not a de Polignac number, because 13555973 - 2⁴ = 13555957 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 (13555943) 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, 1223 + ... + 5348.

It is an arithmetic number, because the mean of its divisors is an integer number (3391152).

Almost surely, 2^13555973 is an apocalyptic number.

It is an amenable number.

13555973 is a deficient number, since it is larger than the sum of its proper divisors (8635).

13555973 is an equidigital number, since it uses as much as digits as its factorization.

13555973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634.

The product of its digits is 70875, while the sum is 38.

The square root of 13555973 is about 3681.8436957590. The cubic root of 13555973 is about 238.4387840317.

The spelling of 13555973 in words is "thirteen million, five hundred fifty-five thousand, nine hundred seventy-three".