49991017 has 2 divisors, whose sum is σ = 49991018. Its totient is φ = 49991016.

The previous prime is 49990981. The next prime is 49991023. The reversal of 49991017 is 71019994.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26020201 + 23970816 = 5101^2 + 4896^2 .

It is a cyclic number.

It is not a de Polignac number, because 49991017 - 2¹¹ = 49988969 is a prime.

It is not a weakly prime, because it can be changed into another prime (49991047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24995508 + 24995509.

It is an arithmetic number, because the mean of its divisors is an integer number (24995509).

Almost surely, 2^49991017 is an apocalyptic number.

It is an amenable number.

49991017 is a deficient number, since it is larger than the sum of its proper divisors (1).

49991017 is an equidigital number, since it uses as much as digits as its factorization.

49991017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 49991017 is about 7070.4325893116. The cubic root of 49991017 is about 368.3810861060.

The spelling of 49991017 in words is "forty-nine million, nine hundred ninety-one thousand, seventeen".