48487721 has 4 divisors (see below), whose sum is σ = 48576912. Its totient is φ = 48398532.

The previous prime is 48487709. The next prime is 48487781. The reversal of 48487721 is 12778484.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 48487721 - 2¹⁸ = 48225577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (48487781) 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, 43775 + ... + 44868.

It is an arithmetic number, because the mean of its divisors is an integer number (12144228).

Almost surely, 2^48487721 is an apocalyptic number.

It is an amenable number.

48487721 is a deficient number, since it is larger than the sum of its proper divisors (89191).

48487721 is an equidigital number, since it uses as much as digits as its factorization.

48487721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89190.

The product of its digits is 100352, while the sum is 41.

The square root of 48487721 is about 6963.3125019634. The cubic root of 48487721 is about 364.6508727671.

The spelling of 48487721 in words is "forty-eight million, four hundred eighty-seven thousand, seven hundred twenty-one".