49971657 has 4 divisors (see below), whose sum is σ = 66628880. Its totient is φ = 33314436.

The previous prime is 49971613. The next prime is 49971667. The reversal of 49971657 is 75617994.

It is a happy number.

49971657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 49971657 - 2¹⁶ = 49906121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49971667) 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 in 3 ways as a sum of consecutive naturals, for example, 8328607 + ... + 8328612.

It is an arithmetic number, because the mean of its divisors is an integer number (16657220).

Almost surely, 2^49971657 is an apocalyptic number.

It is an amenable number.

49971657 is a deficient number, since it is larger than the sum of its proper divisors (16657223).

49971657 is a wasteful number, since it uses less digits than its factorization.

49971657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16657222.

The product of its digits is 476280, while the sum is 48.

The square root of 49971657 is about 7069.0633750165. The cubic root of 49971657 is about 368.3335257035. Note that the first 3 decimals are identical.

The spelling of 49971657 in words is "forty-nine million, nine hundred seventy-one thousand, six hundred fifty-seven".