245309147 has 4 divisors (see below), whose sum is σ = 245374176. Its totient is φ = 245244120.

The previous prime is 245309137. The next prime is 245309153. The reversal of 245309147 is 741903542.

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

It is a cyclic number.

It is not a de Polignac number, because 245309147 - 2⁶ = 245309083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245309117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26483 + ... + 34524.

It is an arithmetic number, because the mean of its divisors is an integer number (61343544).

Almost surely, 2^245309147 is an apocalyptic number.

245309147 is a deficient number, since it is larger than the sum of its proper divisors (65029).

245309147 is an equidigital number, since it uses as much as digits as its factorization.

245309147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65028.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 245309147 is about 15662.3480678984. The cubic root of 245309147 is about 625.9955521329.

The spelling of 245309147 in words is "two hundred forty-five million, three hundred nine thousand, one hundred forty-seven".