9969961 has 4 divisors (see below), whose sum is σ = 10017424. Its totient is φ = 9922500.

The previous prime is 9969959. The next prime is 9970001. The reversal of 9969961 is 1699699.

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: 1699699 = 31 ⋅54829.

It is a 4-Lehmer number, since φ(9969961) divides (9969961-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 9969961 - 2¹ = 9969959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9969931) 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, 23415 + ... + 23836.

It is an arithmetic number, because the mean of its divisors is an integer number (2504356).

Almost surely, 2^9969961 is an apocalyptic number.

It is an amenable number.

9969961 is a deficient number, since it is larger than the sum of its proper divisors (47463).

9969961 is a wasteful number, since it uses less digits than its factorization.

9969961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47462.

The product of its digits is 236196, while the sum is 49.

The square root of 9969961 is about 3157.5245050514. The cubic root of 9969961 is about 215.2275290925.

The spelling of 9969961 in words is "nine million, nine hundred sixty-nine thousand, nine hundred sixty-one".