7149909 has 16 divisors (see below), whose sum is σ = 10808000. Its totient is φ = 4167936.

The previous prime is 7149907. The next prime is 7149929. The reversal of 7149909 is 9099417.

It is not a de Polignac number, because 7149909 - 2¹ = 7149907 is a prime.

It is a super-2 number, since 2×7149909² = 102242397416562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7149907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4084 + ... + 5565.

It is an arithmetic number, because the mean of its divisors is an integer number (675500).

Almost surely, 2^7149909 is an apocalyptic number.

It is an amenable number.

7149909 is a deficient number, since it is larger than the sum of its proper divisors (3658091).

7149909 is a wasteful number, since it uses less digits than its factorization.

7149909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9684.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 7149909 is about 2673.9313753348. The cubic root of 7149909 is about 192.6490350892.

The spelling of 7149909 in words is "seven million, one hundred forty-nine thousand, nine hundred nine".