9920771 has 4 divisors (see below), whose sum is σ = 11338032. Its totient is φ = 8503512.

The previous prime is 9920749. The next prime is 9920777. The reversal of 9920771 is 1770299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1770299 = 89 ⋅19891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9920771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920777) 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, 708620 + ... + 708633.

It is an arithmetic number, because the mean of its divisors is an integer number (2834508).

Almost surely, 2^9920771 is an apocalyptic number.

9920771 is a deficient number, since it is larger than the sum of its proper divisors (1417261).

9920771 is a wasteful number, since it uses less digits than its factorization.

9920771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417260.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 9920771 is about 3149.7255435990. The cubic root of 9920771 is about 214.8729806791.

The spelling of 9920771 in words is "nine million, nine hundred twenty thousand, seven hundred seventy-one".