49421509 has 4 divisors (see below), whose sum is σ = 49600204. Its totient is φ = 49242816.

The previous prime is 49421501. The next prime is 49421521. The reversal of 49421509 is 90512494.

49421509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4397409 + 45024100 = 2097^2 + 6710^2 .

It is a cyclic number.

It is not a de Polignac number, because 49421509 - 2³ = 49421501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49421501) 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 in 3 ways as a sum of consecutive naturals, for example, 88932 + ... + 89485.

It is an arithmetic number, because the mean of its divisors is an integer number (12400051).

Almost surely, 2^49421509 is an apocalyptic number.

It is an amenable number.

49421509 is a deficient number, since it is larger than the sum of its proper divisors (178695).

49421509 is a wasteful number, since it uses less digits than its factorization.

49421509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178694.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 49421509 is about 7030.0433142336. The cubic root of 49421509 is about 366.9768489134.

The spelling of 49421509 in words is "forty-nine million, four hundred twenty-one thousand, five hundred nine".