49658821 has 4 divisors (see below), whose sum is σ = 49678272. Its totient is φ = 49639372.

The previous prime is 49658813. The next prime is 49658839. The reversal of 49658821 is 12885694.

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 49658821 - 2³ = 49658813 is a prime.

It is a super-2 number, since 2×49658821² = 4931997006220082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49655821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5191 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (12419568).

Almost surely, 2^49658821 is an apocalyptic number.

It is an amenable number.

49658821 is a deficient number, since it is larger than the sum of its proper divisors (19451).

49658821 is a wasteful number, since it uses less digits than its factorization.

49658821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19450.

The product of its digits is 138240, while the sum is 43.

The square root of 49658821 is about 7046.9015176885. The cubic root of 49658821 is about 367.5632938942.

The spelling of 49658821 in words is "forty-nine million, six hundred fifty-eight thousand, eight hundred twenty-one".