49991773 has 18 divisors (see below), whose sum is σ = 56395374. Its totient is φ = 44051904.

The previous prime is 49991741. The next prime is 49991779. The reversal of 49991773 is 37719994.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 458329 + 49533444 = 677^2 + 7038^2 .

It is not a de Polignac number, because 49991773 - 2⁵ = 49991741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 943215 + ... + 943267.

Almost surely, 2^49991773 is an apocalyptic number.

It is an amenable number.

49991773 is a deficient number, since it is larger than the sum of its proper divisors (6403601).

49991773 is an equidigital number, since it uses as much as digits as its factorization.

49991773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 103 counting only the distinct ones).

The product of its digits is 428652, while the sum is 49.

The square root of 49991773 is about 7070.4860511849. The cubic root of 49991773 is about 368.3829430710.

The spelling of 49991773 in words is "forty-nine million, nine hundred ninety-one thousand, seven hundred seventy-three".