961784678 has 4 divisors (see below), whose sum is σ = 1442677020. Its totient is φ = 480892338.

The previous prime is 961784671. The next prime is 961784687. The reversal of 961784678 is 876487169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 876487169 = 11779 ⋅74411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961784671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240446168 + ... + 240446171.

It is an arithmetic number, because the mean of its divisors is an integer number (360669255).

Almost surely, 2^961784678 is an apocalyptic number.

961784678 is a deficient number, since it is larger than the sum of its proper divisors (480892342).

961784678 is a wasteful number, since it uses less digits than its factorization.

961784678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480892341.

The product of its digits is 4064256, while the sum is 56.

The square root of 961784678 is about 31012.6535143319. The cubic root of 961784678 is about 987.0957560920.

The spelling of 961784678 in words is "nine hundred sixty-one million, seven hundred eighty-four thousand, six hundred seventy-eight".