9661415 has 4 divisors (see below), whose sum is σ = 11593704. Its totient is φ = 7729128.

The previous prime is 9661409. The next prime is 9661417. The reversal of 9661415 is 5141669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5141669 = 13 ⋅395513.

It is a cyclic number.

It is not a de Polignac number, because 9661415 - 2⁸ = 9661159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9661417) 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, 966137 + ... + 966146.

It is an arithmetic number, because the mean of its divisors is an integer number (2898426).

Almost surely, 2^9661415 is an apocalyptic number.

9661415 is a deficient number, since it is larger than the sum of its proper divisors (1932289).

9661415 is a wasteful number, since it uses less digits than its factorization.

9661415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932288.

The product of its digits is 6480, while the sum is 32.

The square root of 9661415 is about 3108.2816796423. The cubic root of 9661415 is about 212.9839672886.

The spelling of 9661415 in words is "nine million, six hundred sixty-one thousand, four hundred fifteen".