48409921 has 4 divisors (see below), whose sum is σ = 55325632. Its totient is φ = 41494212.

The previous prime is 48409919. The next prime is 48409937. The reversal of 48409921 is 12990484.

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 48409921 - 2¹ = 48409919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48409901) 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, 3457845 + ... + 3457858.

It is an arithmetic number, because the mean of its divisors is an integer number (13831408).

Almost surely, 2^48409921 is an apocalyptic number.

It is an amenable number.

48409921 is a deficient number, since it is larger than the sum of its proper divisors (6915711).

48409921 is an equidigital number, since it uses as much as digits as its factorization.

48409921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6915710.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 48409921 is about 6957.7238375779. The cubic root of 48409921 is about 364.4557372821.

The spelling of 48409921 in words is "forty-eight million, four hundred nine thousand, nine hundred twenty-one".