49871661 has 12 divisors (see below), whose sum is σ = 77352192. Its totient is φ = 28498008.

The previous prime is 49871617. The next prime is 49871663. The reversal of 49871661 is 16617894.

It is a de Polignac number, because none of the positive numbers 2^k-49871661 is a prime.

It is a super-3 number, since 3×49871661³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49871663) 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 11 ways as a sum of consecutive naturals, for example, 169485 + ... + 169778.

It is an arithmetic number, because the mean of its divisors is an integer number (6446016).

Almost surely, 2^49871661 is an apocalyptic number.

It is an amenable number.

49871661 is a deficient number, since it is larger than the sum of its proper divisors (27480531).

49871661 is a wasteful number, since it uses less digits than its factorization.

49871661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339280 (or 339273 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 49871661 is about 7061.9870433186. The cubic root of 49871661 is about 368.0876765140.

The spelling of 49871661 in words is "forty-nine million, eight hundred seventy-one thousand, six hundred sixty-one".