1953125543 has 2 divisors, whose sum is σ = 1953125544. Its totient is φ = 1953125542.

The previous prime is 1953125497. The next prime is 1953125599. The reversal of 1953125543 is 3455213591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1953125543 - 2¹⁰ = 1953124519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1953125497 and 1953125506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953125143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976562771 + 976562772.

It is an arithmetic number, because the mean of its divisors is an integer number (976562772).

Almost surely, 2^1953125543 is an apocalyptic number.

1953125543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953125543 is an equidigital number, since it uses as much as digits as its factorization.

1953125543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 1953125543 is about 44194.1799675025. The cubic root of 1953125543 is about 1250.0001158400. Note that the first 3 decimals are identical.

The spelling of 1953125543 in words is "one billion, nine hundred fifty-three million, one hundred twenty-five thousand, five hundred forty-three".