48638729 has 2 divisors, whose sum is σ = 48638730. Its totient is φ = 48638728.

The previous prime is 48638687. The next prime is 48638731. The reversal of 48638729 is 92783684.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47293129 + 1345600 = 6877^2 + 1160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48638729 is a prime.

It is a Sophie Germain prime.

Together with 48638731, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (48635729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24319364 + 24319365.

It is an arithmetic number, because the mean of its divisors is an integer number (24319365).

Almost surely, 2^48638729 is an apocalyptic number.

It is an amenable number.

48638729 is a deficient number, since it is larger than the sum of its proper divisors (1).

48638729 is an equidigital number, since it uses as much as digits as its factorization.

48638729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 48638729 is about 6974.1471880080. The cubic root of 48638729 is about 365.0290312806.

The spelling of 48638729 in words is "forty-eight million, six hundred thirty-eight thousand, seven hundred twenty-nine".