40653509 has 16 divisors (see below), whose sum is σ = 45405360. Its totient is φ = 36157440.

The previous prime is 40653499. The next prime is 40653527. The reversal of 40653509 is 90535604.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5808100 + 34845409 = 2410^2 + 5903^2 .

It is a cyclic number.

It is not a de Polignac number, because 40653509 - 2⁸ = 40653253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40653539) 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, 47009 + ... + 47865.

It is an arithmetic number, because the mean of its divisors is an integer number (2837835).

Almost surely, 2^40653509 is an apocalyptic number.

It is an amenable number.

40653509 is a deficient number, since it is larger than the sum of its proper divisors (4751851).

40653509 is a wasteful number, since it uses less digits than its factorization.

40653509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 40653509 is about 6376.0104297280. The cubic root of 40653509 is about 343.8476119928.

The spelling of 40653509 in words is "forty million, six hundred fifty-three thousand, five hundred nine".