49018921 has 4 divisors (see below), whose sum is σ = 56021632. Its totient is φ = 42016212.

The previous prime is 49018913. The next prime is 49018927. The reversal of 49018921 is 12981094.

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 not a de Polignac number, because 49018921 - 2³ = 49018913 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 (49018927) 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, 3501345 + ... + 3501358.

It is an arithmetic number, because the mean of its divisors is an integer number (14005408).

Almost surely, 2^49018921 is an apocalyptic number.

It is an amenable number.

49018921 is a deficient number, since it is larger than the sum of its proper divisors (7002711).

49018921 is an equidigital number, since it uses as much as digits as its factorization.

49018921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7002710.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 49018921 is about 7001.3513695572. The cubic root of 49018921 is about 365.9776654332.

The spelling of 49018921 in words is "forty-nine million, eighteen thousand, nine hundred twenty-one".