249430705 has 4 divisors (see below), whose sum is σ = 299316852. Its totient is φ = 199544560.

The previous prime is 249430703. The next prime is 249430717. The reversal of 249430705 is 507034942.

249430705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111344704 + 138086001 = 10552^2 + 11751^2 .

It is not a de Polignac number, because 249430705 - 2¹ = 249430703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249430703) 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, 24943066 + ... + 24943075.

It is an arithmetic number, because the mean of its divisors is an integer number (74829213).

Almost surely, 2^249430705 is an apocalyptic number.

It is an amenable number.

249430705 is a deficient number, since it is larger than the sum of its proper divisors (49886147).

249430705 is an equidigital number, since it uses as much as digits as its factorization.

249430705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49886146.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 249430705 is about 15793.3753517100. The cubic root of 249430705 is about 629.4819836858.

The spelling of 249430705 in words is "two hundred forty-nine million, four hundred thirty thousand, seven hundred five".