2509969 has 16 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 1900800.

The previous prime is 2509963. The next prime is 2509981. The reversal of 2509969 is 9699052.

It is not a de Polignac number, because 2509969 - 2³ = 2509961 is a prime.

It is a super-2 number, since 2×2509969² = 12599888761922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509961) 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, 2409 + ... + 3289.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^2509969 is an apocalyptic number.

It is an amenable number.

2509969 is a deficient number, since it is larger than the sum of its proper divisors (707567).

2509969 is a wasteful number, since it uses less digits than its factorization.

2509969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 2509969 is about 1584.2881682320. The cubic root of 2509969 is about 135.9010417664.

The spelling of 2509969 in words is "two million, five hundred nine thousand, nine hundred sixty-nine".