961991935 has 4 divisors (see below), whose sum is σ = 1154390328. Its totient is φ = 769593544.

The previous prime is 961991893. The next prime is 961991941. The reversal of 961991935 is 539199169.

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

It is a cyclic number.

It is not a de Polignac number, because 961991935 - 2⁹ = 961991423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96199189 + ... + 96199198.

It is an arithmetic number, because the mean of its divisors is an integer number (288597582).

Almost surely, 2^961991935 is an apocalyptic number.

961991935 is a deficient number, since it is larger than the sum of its proper divisors (192398393).

961991935 is a wasteful number, since it uses less digits than its factorization.

961991935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192398392.

The product of its digits is 590490, while the sum is 52.

The square root of 961991935 is about 31015.9948252511. The cubic root of 961991935 is about 987.1666547786.

The spelling of 961991935 in words is "nine hundred sixty-one million, nine hundred ninety-one thousand, nine hundred thirty-five".