49491217 has 2 divisors, whose sum is σ = 49491218. Its totient is φ = 49491216.

The previous prime is 49491203. The next prime is 49491229. The reversal of 49491217 is 71219494.

49491217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 13957696 = 5961^2 + 3736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49491217 is a prime.

It is not a weakly prime, because it can be changed into another prime (49491287) 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 as a sum of consecutive naturals, namely, 24745608 + 24745609.

It is an arithmetic number, because the mean of its divisors is an integer number (24745609).

Almost surely, 2^49491217 is an apocalyptic number.

It is an amenable number.

49491217 is a deficient number, since it is larger than the sum of its proper divisors (1).

49491217 is an equidigital number, since it uses as much as digits as its factorization.

49491217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 49491217 is about 7034.9994314143. Note that the first 3 decimals coincide. The cubic root of 49491217 is about 367.1493055682.

The spelling of 49491217 in words is "forty-nine million, four hundred ninety-one thousand, two hundred seventeen".