961779 has 24 divisors (see below), whose sum is σ = 1592832. Its totient is φ = 505440.

The previous prime is 961777. The next prime is 961783. The reversal of 961779 is 977169.

It is not a de Polignac number, because 961779 - 2¹ = 961777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

Its product of digits (23814) is a multiple of the sum of its prime divisors (294).

It is not an unprimeable number, because it can be changed into a prime (961777) 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 in 23 ways as a sum of consecutive naturals, for example, 3414 + ... + 3684.

It is an arithmetic number, because the mean of its divisors is an integer number (66368).

2⁹⁶¹⁷⁷⁹ is an apocalyptic number.

961779 is a deficient number, since it is larger than the sum of its proper divisors (631053).

961779 is a wasteful number, since it uses less digits than its factorization.

961779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 294 counting only the distinct ones).

The product of its digits is 23814, while the sum is 39.

The square root of 961779 is about 980.7033190522. The cubic root of 961779 is about 98.7093813613.

The spelling of 961779 in words is "nine hundred sixty-one thousand, seven hundred seventy-nine".