961935591 has 16 divisors (see below), whose sum is σ = 1353340800. Its totient is φ = 606073248.

The previous prime is 961935581. The next prime is 961935613. The reversal of 961935591 is 195539169.

It is not a de Polignac number, because 961935591 - 2¹¹ = 961933543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 961935591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961935551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3745 + ... + 44021.

It is an arithmetic number, because the mean of its divisors is an integer number (84583800).

Almost surely, 2^961935591 is an apocalyptic number.

961935591 is a deficient number, since it is larger than the sum of its proper divisors (391405209).

961935591 is a wasteful number, since it uses less digits than its factorization.

961935591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40718.

The product of its digits is 328050, while the sum is 48.

The square root of 961935591 is about 31015.0865064085. The cubic root of 961935591 is about 987.1473815734.

The spelling of 961935591 in words is "nine hundred sixty-one million, nine hundred thirty-five thousand, five hundred ninety-one".