9961671 has 4 divisors (see below), whose sum is σ = 13282232. Its totient is φ = 6641112.

The previous prime is 9961669. The next prime is 9961673. The reversal of 9961671 is 1761699.

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

It is an interprime number because it is at equal distance from previous prime (9961669) and next prime (9961673).

It is not a de Polignac number, because 9961671 - 2¹ = 9961669 is a prime.

It is a super-2 number, since 2×9961671² = 198469778224482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961673) 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, 1660276 + ... + 1660281.

It is an arithmetic number, because the mean of its divisors is an integer number (3320558).

Almost surely, 2^9961671 is an apocalyptic number.

9961671 is a deficient number, since it is larger than the sum of its proper divisors (3320561).

9961671 is a wasteful number, since it uses less digits than its factorization.

9961671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320560.

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

The square root of 9961671 is about 3156.2114948146. The cubic root of 9961671 is about 215.1678588165.

The spelling of 9961671 in words is "nine million, nine hundred sixty-one thousand, six hundred seventy-one".