248806639 has 2 divisors, whose sum is σ = 248806640. Its totient is φ = 248806638.

The previous prime is 248806633. The next prime is 248806669. The reversal of 248806639 is 936608842.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248806639 - 2¹³ = 248798447 is a prime.

It is a super-2 number, since 2×248806639² = 123809487220952642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248806633) 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 as a sum of consecutive naturals, namely, 124403319 + 124403320.

It is an arithmetic number, because the mean of its divisors is an integer number (124403320).

Almost surely, 2^248806639 is an apocalyptic number.

248806639 is a deficient number, since it is larger than the sum of its proper divisors (1).

248806639 is an equidigital number, since it uses as much as digits as its factorization.

248806639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 248806639 is about 15773.6057704001. The cubic root of 248806639 is about 628.9565653712.

The spelling of 248806639 in words is "two hundred forty-eight million, eight hundred six thousand, six hundred thirty-nine".