9975919 has 4 divisors (see below), whose sum is σ = 10000720. Its totient is φ = 9951120.

The previous prime is 9975899. The next prime is 9975943. The reversal of 9975919 is 9195799.

9975919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9195799 = 59 ⋅155861.

It is a cyclic number.

It is not a de Polignac number, because 9975919 - 2¹¹ = 9973871 is a prime.

It is a super-2 number, since 2×9975919² = 199037919789122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975989) 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, 11787 + ... + 12604.

It is an arithmetic number, because the mean of its divisors is an integer number (2500180).

Almost surely, 2^9975919 is an apocalyptic number.

9975919 is a deficient number, since it is larger than the sum of its proper divisors (24801).

9975919 is a wasteful number, since it uses less digits than its factorization.

9975919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24800.

The product of its digits is 229635, while the sum is 49.

The square root of 9975919 is about 3158.4678247530. The cubic root of 9975919 is about 215.2703935285.

The spelling of 9975919 in words is "nine million, nine hundred seventy-five thousand, nine hundred nineteen".