9661501 has 4 divisors (see below), whose sum is σ = 9671904. Its totient is φ = 9651100.

The previous prime is 9661489. The next prime is 9661507. The reversal of 9661501 is 1051669.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1051669 = 19 ⋅55351.

It is a cyclic number.

It is not a de Polignac number, because 9661501 - 2⁷ = 9661373 is a prime.

It is a Duffinian number.

9661501 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9661501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3655 + ... + 5716.

It is an arithmetic number, because the mean of its divisors is an integer number (2417976).

Almost surely, 2^9661501 is an apocalyptic number.

It is an amenable number.

9661501 is a deficient number, since it is larger than the sum of its proper divisors (10403).

9661501 is a wasteful number, since it uses less digits than its factorization.

9661501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10402.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 9661501 is about 3108.2955136216. The cubic root of 9661501 is about 212.9845992377.

The spelling of 9661501 in words is "nine million, six hundred sixty-one thousand, five hundred one".