245307729 has 4 divisors (see below), whose sum is σ = 327076976. Its totient is φ = 163538484.

The previous prime is 245307709. The next prime is 245307737. The reversal of 245307729 is 927703542.

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 not a de Polignac number, because 245307729 - 2⁵ = 245307697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245307709) 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, 40884619 + ... + 40884624.

It is an arithmetic number, because the mean of its divisors is an integer number (81769244).

Almost surely, 2^245307729 is an apocalyptic number.

It is an amenable number.

245307729 is a deficient number, since it is larger than the sum of its proper divisors (81769247).

245307729 is an equidigital number, since it uses as much as digits as its factorization.

245307729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81769246.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 245307729 is about 15662.3028000355. The cubic root of 245307729 is about 625.9943459495.

The spelling of 245307729 in words is "two hundred forty-five million, three hundred seven thousand, seven hundred twenty-nine".