9935812961 has 4 divisors (see below), whose sum is σ = 9936696000. Its totient is φ = 9934929924.

The previous prime is 9935812949. The next prime is 9935812963. The reversal of 9935812961 is 1692185399.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1692185399 = 389 ⋅4350091.

It is a cyclic number.

It is not a de Polignac number, because 9935812961 - 2⁶ = 9935812897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9935812963) 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, 424421 + ... + 447218.

It is an arithmetic number, because the mean of its divisors is an integer number (2484174000).

Almost surely, 2^9935812961 is an apocalyptic number.

It is an amenable number.

9935812961 is a deficient number, since it is larger than the sum of its proper divisors (883039).

9935812961 is a wasteful number, since it uses less digits than its factorization.

9935812961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883038.

The product of its digits is 1049760, while the sum is 53.

The square root of 9935812961 is about 99678.5481485360. The cubic root of 9935812961 is about 2149.8152327968.

The spelling of 9935812961 in words is "nine billion, nine hundred thirty-five million, eight hundred twelve thousand, nine hundred sixty-one".