49247921 has 4 divisors (see below), whose sum is σ = 49354752. Its totient is φ = 49141092.

The previous prime is 49247909. The next prime is 49247941. The reversal of 49247921 is 12974294.

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 a de Polignac number, because none of the positive numbers 2^k-49247921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49247941) 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, 52721 + ... + 53646.

It is an arithmetic number, because the mean of its divisors is an integer number (12338688).

Almost surely, 2^49247921 is an apocalyptic number.

It is an amenable number.

49247921 is a deficient number, since it is larger than the sum of its proper divisors (106831).

49247921 is a wasteful number, since it uses less digits than its factorization.

49247921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106830.

The product of its digits is 36288, while the sum is 38.

The square root of 49247921 is about 7017.6862996290. The cubic root of 49247921 is about 366.5466886615.

The spelling of 49247921 in words is "forty-nine million, two hundred forty-seven thousand, nine hundred twenty-one".