9920869 has 16 divisors (see below), whose sum is σ = 12073600. Its totient is φ = 7962624.

The previous prime is 9920863. The next prime is 9920873. The reversal of 9920869 is 9680299.

9920869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 8-Lehmer number, since φ(9920869) divides (9920869-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 9920869 - 2³ = 9920861 is a prime.

It is a super-2 number, since 2×9920869² = 196847283430322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12517 + ... + 13285.

It is an arithmetic number, because the mean of its divisors is an integer number (754600).

Almost surely, 2^9920869 is an apocalyptic number.

It is an amenable number.

9920869 is a deficient number, since it is larger than the sum of its proper divisors (2152731).

9920869 is a wasteful number, since it uses less digits than its factorization.

9920869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 9920869 is about 3149.7411004716. The cubic root of 9920869 is about 214.8736882008.

The spelling of 9920869 in words is "nine million, nine hundred twenty thousand, eight hundred sixty-nine".