9961761 has 16 divisors (see below), whose sum is σ = 13953600. Its totient is φ = 6312768.

The previous prime is 9961739. The next prime is 9961771. The reversal of 9961761 is 1671699.

It is not a de Polignac number, because 9961761 - 2⁹ = 9961249 is a prime.

It is a super-2 number, since 2×9961761² = 198473364442242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9961771) 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, 4975 + ... + 6683.

It is an arithmetic number, because the mean of its divisors is an integer number (872100).

Almost surely, 2^9961761 is an apocalyptic number.

It is an amenable number.

9961761 is a deficient number, since it is larger than the sum of its proper divisors (3991839).

9961761 is a wasteful number, since it uses less digits than its factorization.

9961761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

The product of its digits is 20412, while the sum is 39.

The square root of 9961761 is about 3156.2257523821. The cubic root of 9961761 is about 215.1685068018.

The spelling of 9961761 in words is "nine million, nine hundred sixty-one thousand, seven hundred sixty-one".