9945611 has 4 divisors (see below), whose sum is σ = 10710672. Its totient is φ = 9180552.

The previous prime is 9945587. The next prime is 9945619. The reversal of 9945611 is 1165499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1165499 = 719 ⋅1621.

It is a cyclic number.

It is not a de Polignac number, because 9945611 - 2²² = 5751307 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9945619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382511 + ... + 382536.

It is an arithmetic number, because the mean of its divisors is an integer number (2677668).

Almost surely, 2^9945611 is an apocalyptic number.

9945611 is a deficient number, since it is larger than the sum of its proper divisors (765061).

9945611 is a wasteful number, since it uses less digits than its factorization.

9945611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765060.

The product of its digits is 9720, while the sum is 35.

The square root of 9945611 is about 3153.6662791107. Note that the first 3 decimals coincide. The cubic root of 9945611 is about 215.0521668979.

The spelling of 9945611 in words is "nine million, nine hundred forty-five thousand, six hundred eleven".