961611749 has 16 divisors (see below), whose sum is σ = 1164492288. Its totient is φ = 775180032.

The previous prime is 961611743. The next prime is 961611751. The reversal of 961611749 is 947116169.

It is a happy number.

961611749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 961611749 - 2²⁴ = 944834533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961611743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243539 + ... + 247455.

It is an arithmetic number, because the mean of its divisors is an integer number (72780768).

Almost surely, 2^961611749 is an apocalyptic number.

It is an amenable number.

961611749 is a deficient number, since it is larger than the sum of its proper divisors (202880539).

961611749 is a wasteful number, since it uses less digits than its factorization.

961611749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004.

The product of its digits is 81648, while the sum is 44.

The square root of 961611749 is about 31009.8653495948. The cubic root of 961611749 is about 987.0365925677.

The spelling of 961611749 in words is "nine hundred sixty-one million, six hundred eleven thousand, seven hundred forty-nine".