48939721 has 2 divisors, whose sum is σ = 48939722. Its totient is φ = 48939720.

The previous prime is 48939707. The next prime is 48939743. The reversal of 48939721 is 12793984.

48939721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37454400 + 11485321 = 6120^2 + 3389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48939721 is a prime.

It is not a weakly prime, because it can be changed into another prime (48949721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24469860 + 24469861.

It is an arithmetic number, because the mean of its divisors is an integer number (24469861).

Almost surely, 2^48939721 is an apocalyptic number.

It is an amenable number.

48939721 is a deficient number, since it is larger than the sum of its proper divisors (1).

48939721 is an equidigital number, since it uses as much as digits as its factorization.

48939721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 48939721 is about 6995.6930321448. The cubic root of 48939721 is about 365.7804554909.

The spelling of 48939721 in words is "forty-eight million, nine hundred thirty-nine thousand, seven hundred twenty-one".