244706639 has 4 divisors (see below), whose sum is σ = 244954560. Its totient is φ = 244458720.

The previous prime is 244706633. The next prime is 244706647. The reversal of 244706639 is 936607442.

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 244706639 - 2⁸ = 244706383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244706596 and 244706605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244706633) 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, 122474 + ... + 124455.

It is an arithmetic number, because the mean of its divisors is an integer number (61238640).

Almost surely, 2^244706639 is an apocalyptic number.

244706639 is a deficient number, since it is larger than the sum of its proper divisors (247921).

244706639 is an equidigital number, since it uses as much as digits as its factorization.

244706639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247920.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 244706639 is about 15643.1019622069. The cubic root of 244706639 is about 625.4826258331.

The spelling of 244706639 in words is "two hundred forty-four million, seven hundred six thousand, six hundred thirty-nine".