9940511 has 4 divisors (see below), whose sum is σ = 11360592. Its totient is φ = 8520432.

The previous prime is 9940507. The next prime is 9940519. The reversal of 9940511 is 1150499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1150499 = 7 ⋅164357.

It is a cyclic number.

It is not a de Polignac number, because 9940511 - 2² = 9940507 is a prime.

It is a super-2 number, since 2×9940511² = 197627517882242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940519) 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, 710030 + ... + 710043.

It is an arithmetic number, because the mean of its divisors is an integer number (2840148).

Almost surely, 2^9940511 is an apocalyptic number.

9940511 is a deficient number, since it is larger than the sum of its proper divisors (1420081).

9940511 is a wasteful number, since it uses less digits than its factorization.

9940511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420080.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 9940511 is about 3152.8575927244. The cubic root of 9940511 is about 215.0154018171.

The spelling of 9940511 in words is "nine million, nine hundred forty thousand, five hundred eleven".