9960815 has 4 divisors (see below), whose sum is σ = 11952984. Its totient is φ = 7968648.

The previous prime is 9960787. The next prime is 9960869. The reversal of 9960815 is 5180699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9960815 - 2¹² = 9956719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996077 + ... + 996086.

It is an arithmetic number, because the mean of its divisors is an integer number (2988246).

Almost surely, 2^9960815 is an apocalyptic number.

9960815 is a deficient number, since it is larger than the sum of its proper divisors (1992169).

9960815 is a wasteful number, since it uses less digits than its factorization.

9960815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992168.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9960815 is about 3156.0758862866. The cubic root of 9960815 is about 215.1616955612.

The spelling of 9960815 in words is "nine million, nine hundred sixty thousand, eight hundred fifteen".