961943539 has 2 divisors, whose sum is σ = 961943540. Its totient is φ = 961943538.

The previous prime is 961943531. The next prime is 961943551. The reversal of 961943539 is 935349169.

It is a weak prime.

It is an emirp because it is prime and its reverse (935349169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961943539 - 2³ = 961943531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 961943492 and 961943501.

It is not a weakly prime, because it can be changed into another prime (961943531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480971769 + 480971770.

It is an arithmetic number, because the mean of its divisors is an integer number (480971770).

Almost surely, 2^961943539 is an apocalyptic number.

961943539 is a deficient number, since it is larger than the sum of its proper divisors (1).

961943539 is an equidigital number, since it uses as much as digits as its factorization.

961943539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 961943539 is about 31015.2146373357. The cubic root of 961943539 is about 987.1501003368.

The spelling of 961943539 in words is "nine hundred sixty-one million, nine hundred forty-three thousand, five hundred thirty-nine".