9901939 has 16 divisors (see below), whose sum is σ = 10869120. Its totient is φ = 8985600.

The previous prime is 9901901. The next prime is 9901981. The reversal of 9901939 is 9391099.

9901939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9901939 - 2⁹ = 9901427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9901999) 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, 97989 + ... + 98089.

It is an arithmetic number, because the mean of its divisors is an integer number (679320).

Almost surely, 2^9901939 is an apocalyptic number.

9901939 is a deficient number, since it is larger than the sum of its proper divisors (967181).

9901939 is a wasteful number, since it uses less digits than its factorization.

9901939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 9901939 is about 3146.7346567513. The cubic root of 9901939 is about 214.7369344291.

The spelling of 9901939 in words is "nine million, nine hundred one thousand, nine hundred thirty-nine".