9961869 has 4 divisors (see below), whose sum is σ = 13282496. Its totient is φ = 6641244.

The previous prime is 9961867. The next prime is 9961873. The reversal of 9961869 is 9681699.

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.

It is not a de Polignac number, because 9961869 - 2¹ = 9961867 is a prime.

It is a super-2 number, since 2×9961869² = 198477667946322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961867) 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, 1660309 + ... + 1660314.

It is an arithmetic number, because the mean of its divisors is an integer number (3320624).

Almost surely, 2^9961869 is an apocalyptic number.

It is an amenable number.

9961869 is a deficient number, since it is larger than the sum of its proper divisors (3320627).

9961869 is a wasteful number, since it uses less digits than its factorization.

9961869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320626.

The product of its digits is 209952, while the sum is 48.

The square root of 9961869 is about 3156.2428613781. The cubic root of 9961869 is about 215.1692843790.

The spelling of 9961869 in words is "nine million, nine hundred sixty-one thousand, eight hundred sixty-nine".