961986449 has 4 divisors (see below), whose sum is σ = 962765364. Its totient is φ = 961207536.

The previous prime is 961986439. The next prime is 961986457. The reversal of 961986449 is 944689169.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 293505424 + 668481025 = 17132^2 + 25855^2 .

It is a cyclic number.

It is not a de Polignac number, because 961986449 - 2⁴ = 961986433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 961986394 and 961986403.

It is not an unprimeable number, because it can be changed into a prime (961986439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387602 + ... + 390075.

It is an arithmetic number, because the mean of its divisors is an integer number (240691341).

Almost surely, 2^961986449 is an apocalyptic number.

It is an amenable number.

961986449 is a deficient number, since it is larger than the sum of its proper divisors (778915).

961986449 is a wasteful number, since it uses less digits than its factorization.

961986449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778914.

The product of its digits is 3359232, while the sum is 56.

The square root of 961986449 is about 31015.9063868848. The cubic root of 961986449 is about 987.1647782533.

The spelling of 961986449 in words is "nine hundred sixty-one million, nine hundred eighty-six thousand, four hundred forty-nine".