1543245139 has 2 divisors, whose sum is σ = 1543245140. Its totient is φ = 1543245138.

The previous prime is 1543245101. The next prime is 1543245157. The reversal of 1543245139 is 9315423451.

It is a strong prime.

It is an emirp because it is prime and its reverse (9315423451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1543245139 - 2⁹ = 1543244627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1543245098 and 1543245107.

It is not a weakly prime, because it can be changed into another prime (1543245169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771622569 + 771622570.

It is an arithmetic number, because the mean of its divisors is an integer number (771622570).

Almost surely, 2^1543245139 is an apocalyptic number.

1543245139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1543245139 is an equidigital number, since it uses as much as digits as its factorization.

1543245139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 1543245139 is about 39284.1588811572. The cubic root of 1543245139 is about 1155.6109257146.

The spelling of 1543245139 in words is "one billion, five hundred forty-three million, two hundred forty-five thousand, one hundred thirty-nine".