245433509 has 4 divisors (see below), whose sum is σ = 245726880. Its totient is φ = 245140140.

The previous prime is 245433499. The next prime is 245433527. The reversal of 245433509 is 905334542.

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 a de Polignac number, because none of the positive numbers 2^k-245433509 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 (245433109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145427 + ... + 147104.

It is an arithmetic number, because the mean of its divisors is an integer number (61431720).

Almost surely, 2^245433509 is an apocalyptic number.

It is an amenable number.

245433509 is a deficient number, since it is larger than the sum of its proper divisors (293371).

245433509 is an equidigital number, since it uses as much as digits as its factorization.

245433509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293370.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 245433509 is about 15666.3176592331. The cubic root of 245433509 is about 626.1013192270.

The spelling of 245433509 in words is "two hundred forty-five million, four hundred thirty-three thousand, five hundred nine".