9920765 has 8 divisors (see below), whose sum is σ = 11955768. Its totient is φ = 7902720.

The previous prime is 9920749. The next prime is 9920777. The reversal of 9920765 is 5670299.

It can be written as a sum of positive squares in 4 ways, for example, as 806404 + 9114361 = 898^2 + 3019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9920765 - 2⁴ = 9920749 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2912 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (1494471).

Almost surely, 2^9920765 is an apocalyptic number.

It is an amenable number.

9920765 is a deficient number, since it is larger than the sum of its proper divisors (2035003).

9920765 is a wasteful number, since it uses less digits than its factorization.

9920765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8479.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 9920765 is about 3149.7245911349. The cubic root of 9920765 is about 214.8729373613.

The spelling of 9920765 in words is "nine million, nine hundred twenty thousand, seven hundred sixty-five".