49438921 has 4 divisors (see below), whose sum is σ = 56501632. Its totient is φ = 42376212.

The previous prime is 49438897. The next prime is 49438927. The reversal of 49438921 is 12983494.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12983494 = 2 ⋅6491747.

It is a cyclic number.

It is not a de Polignac number, because 49438921 - 2¹¹ = 49436873 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49438927) 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, 3531345 + ... + 3531358.

It is an arithmetic number, because the mean of its divisors is an integer number (14125408).

Almost surely, 2^49438921 is an apocalyptic number.

It is an amenable number.

49438921 is a deficient number, since it is larger than the sum of its proper divisors (7062711).

49438921 is an equidigital number, since it uses as much as digits as its factorization.

49438921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062710.

The product of its digits is 62208, while the sum is 40.

The square root of 49438921 is about 7031.2816043734. The cubic root of 49438921 is about 367.0199411538.

The spelling of 49438921 in words is "forty-nine million, four hundred thirty-eight thousand, nine hundred twenty-one".