48918721 has 2 divisors, whose sum is σ = 48918722. Its totient is φ = 48918720.

The previous prime is 48918719. The next prime is 48918739. The reversal of 48918721 is 12781984.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 14167696 = 5895^2 + 3764^2 .

It is a cyclic number.

It is not a de Polignac number, because 48918721 - 2¹ = 48918719 is a prime.

Together with 48918719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (48918791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24459360 + 24459361.

It is an arithmetic number, because the mean of its divisors is an integer number (24459361).

Almost surely, 2^48918721 is an apocalyptic number.

It is an amenable number.

48918721 is a deficient number, since it is larger than the sum of its proper divisors (1).

48918721 is an equidigital number, since it uses as much as digits as its factorization.

48918721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 48918721 is about 6994.1919476091. The cubic root of 48918721 is about 365.7281292934.

The spelling of 48918721 in words is "forty-eight million, nine hundred eighteen thousand, seven hundred twenty-one".