961978529 has 2 divisors, whose sum is σ = 961978530. Its totient is φ = 961978528.

The previous prime is 961978513. The next prime is 961978543. The reversal of 961978529 is 925879169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811965025 + 150013504 = 28495^2 + 12248^2 .

It is a cyclic number.

It is not a de Polignac number, because 961978529 - 2⁴ = 961978513 is a prime.

It is not a weakly prime, because it can be changed into another prime (961978559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480989264 + 480989265.

It is an arithmetic number, because the mean of its divisors is an integer number (480989265).

Almost surely, 2^961978529 is an apocalyptic number.

It is an amenable number.

961978529 is a deficient number, since it is larger than the sum of its proper divisors (1).

961978529 is an equidigital number, since it uses as much as digits as its factorization.

961978529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 56.

The square root of 961978529 is about 31015.7787101985. The cubic root of 961978529 is about 987.1620691485.

The spelling of 961978529 in words is "nine hundred sixty-one million, nine hundred seventy-eight thousand, five hundred twenty-nine".