9961629 has 4 divisors (see below), whose sum is σ = 13282176. Its totient is φ = 6641084.

The previous prime is 9961613. The next prime is 9961631. The reversal of 9961629 is 9261699.

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: 9261699 = 3 ⋅3087233.

It is a cyclic number.

It is not a de Polignac number, because 9961629 - 2⁴ = 9961613 is a prime.

It is a Curzon number.

9961629 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9961649) 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, 1660269 + ... + 1660274.

It is an arithmetic number, because the mean of its divisors is an integer number (3320544).

Almost surely, 2^9961629 is an apocalyptic number.

It is an amenable number.

9961629 is a deficient number, since it is larger than the sum of its proper divisors (3320547).

9961629 is a wasteful number, since it uses less digits than its factorization.

9961629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320546.

The product of its digits is 52488, while the sum is 42.

The square root of 9961629 is about 3156.2048412611. The cubic root of 9961629 is about 215.1675564220.

The spelling of 9961629 in words is "nine million, nine hundred sixty-one thousand, six hundred twenty-nine".