42653309 has 4 divisors (see below), whose sum is σ = 44898240. Its totient is φ = 40408380.

The previous prime is 42653279. The next prime is 42653327. The reversal of 42653309 is 90335624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42653309 - 2¹² = 42649213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42653509) 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, 1122437 + ... + 1122474.

It is an arithmetic number, because the mean of its divisors is an integer number (11224560).

Almost surely, 2^42653309 is an apocalyptic number.

It is an amenable number.

42653309 is a deficient number, since it is larger than the sum of its proper divisors (2244931).

42653309 is a wasteful number, since it uses less digits than its factorization.

42653309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244930.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 42653309 is about 6530.9500840230. The cubic root of 42653309 is about 349.3957164739.

It can be divided in two parts, 426 and 53309, that added together give a palindrome (53735).

The spelling of 42653309 in words is "forty-two million, six hundred fifty-three thousand, three hundred nine".