9901406 has 4 divisors (see below), whose sum is σ = 14852112. Its totient is φ = 4950702.

The previous prime is 9901403. The next prime is 9901421. The reversal of 9901406 is 6041099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6041099 = 53 ⋅113983.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475350 + ... + 2475353.

It is an arithmetic number, because the mean of its divisors is an integer number (3713028).

Almost surely, 2^9901406 is an apocalyptic number.

9901406 is a deficient number, since it is larger than the sum of its proper divisors (4950706).

9901406 is a wasteful number, since it uses less digits than its factorization.

9901406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950705.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 9901406 is about 3146.6499646449. The cubic root of 9901406 is about 214.7330814181.

The spelling of 9901406 in words is "nine million, nine hundred one thousand, four hundred six".