2509693 has 4 divisors (see below), whose sum is σ = 2657340. Its totient is φ = 2362048.

The previous prime is 2509687. The next prime is 2509721. The reversal of 2509693 is 3969052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1026169 + 1483524 = 1013^2 + 1218^2 .

It is not a de Polignac number, because 2509693 - 2⁹ = 2509181 is a prime.

It is a Duffinian number.

2509693 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73798 + ... + 73831.

It is an arithmetic number, because the mean of its divisors is an integer number (664335).

2^2509693 is an apocalyptic number.

It is an amenable number.

2509693 is a deficient number, since it is larger than the sum of its proper divisors (147647).

2509693 is a wasteful number, since it uses less digits than its factorization.

2509693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147646.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2509693 is about 1584.2010604718. The cubic root of 2509693 is about 135.8960602889.

The spelling of 2509693 in words is "two million, five hundred nine thousand, six hundred ninety-three".