1963728539 has 2 divisors, whose sum is σ = 1963728540. Its totient is φ = 1963728538.

The previous prime is 1963728461. The next prime is 1963728551. The reversal of 1963728539 is 9358273691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1963728539 - 2¹⁶ = 1963663003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1963788539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 981864269 + 981864270.

It is an arithmetic number, because the mean of its divisors is an integer number (981864270).

Almost surely, 2^1963728539 is an apocalyptic number.

1963728539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1963728539 is an equidigital number, since it uses as much as digits as its factorization.

1963728539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 1963728539 is about 44313.9767906244. The cubic root of 1963728539 is about 1252.2580069875.

The spelling of 1963728539 in words is "one billion, nine hundred sixty-three million, seven hundred twenty-eight thousand, five hundred thirty-nine".