245738609 has 4 divisors (see below), whose sum is σ = 258672240. Its totient is φ = 232804980.

The previous prime is 245738569. The next prime is 245738627. The reversal of 245738609 is 906837542.

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 245738609 - 2¹² = 245734513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 245738609.

It is not an unprimeable number, because it can be changed into a prime (245758609) 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, 6466787 + ... + 6466824.

It is an arithmetic number, because the mean of its divisors is an integer number (64668060).

Almost surely, 2^245738609 is an apocalyptic number.

It is an amenable number.

245738609 is a deficient number, since it is larger than the sum of its proper divisors (12933631).

245738609 is a wasteful number, since it uses less digits than its factorization.

245738609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12933630.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 245738609 is about 15676.0520859048. The cubic root of 245738609 is about 626.3606486800.

The spelling of 245738609 in words is "two hundred forty-five million, seven hundred thirty-eight thousand, six hundred nine".