1973543 has 16 divisors (see below), whose sum is σ = 2387616. Its totient is φ = 1607040.

The previous prime is 1973539. The next prime is 1973557. The reversal of 1973543 is 3453791.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1973543 - 2² = 1973539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5105 + ... + 5477.

It is an arithmetic number, because the mean of its divisors is an integer number (149226).

2^1973543 is an apocalyptic number.

1973543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1973543 is a deficient number, since it is larger than the sum of its proper divisors (414073).

1973543 is a wasteful number, since it uses less digits than its factorization.

1973543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its digits is 11340, while the sum is 32.

The square root of 1973543 is about 1404.8284592789. The cubic root of 1973543 is about 125.4340748871.

It can be divided in two parts, 197 and 3543, that multiplied together give a triangular number (697971 = T₁₁₈₁).

The spelling of 1973543 in words is "one million, nine hundred seventy-three thousand, five hundred forty-three".