9940915 has 4 divisors (see below), whose sum is σ = 11929104. Its totient is φ = 7952728.

The previous prime is 9940907. The next prime is 9940927. The reversal of 9940915 is 5190499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5190499 = 1367 ⋅3797.

It is a cyclic number.

It is not a de Polignac number, because 9940915 - 2³ = 9940907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994087 + ... + 994096.

It is an arithmetic number, because the mean of its divisors is an integer number (2982276).

Almost surely, 2^9940915 is an apocalyptic number.

9940915 is a deficient number, since it is larger than the sum of its proper divisors (1988189).

9940915 is a wasteful number, since it uses less digits than its factorization.

9940915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988188.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 9940915 is about 3152.9216609361. The cubic root of 9940915 is about 215.0183146468.

It can be divided in two parts, 99 and 40915, that added together give a palindrome (41014).

The spelling of 9940915 in words is "nine million, nine hundred forty thousand, nine hundred fifteen".