49171387 has 4 divisors (see below), whose sum is σ = 49186440. Its totient is φ = 49156336.

The previous prime is 49171379. The next prime is 49171393. The reversal of 49171387 is 78317194.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78317194 = 2 ⋅39158597.

It is a cyclic number.

It is not a de Polignac number, because 49171387 - 2³ = 49171379 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49171687) 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 3 ways as a sum of consecutive naturals, for example, 337 + ... + 9922.

It is an arithmetic number, because the mean of its divisors is an integer number (12296610).

Almost surely, 2^49171387 is an apocalyptic number.

49171387 is a deficient number, since it is larger than the sum of its proper divisors (15053).

49171387 is a wasteful number, since it uses less digits than its factorization.

49171387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15052.

The product of its digits is 42336, while the sum is 40.

The square root of 49171387 is about 7012.2312426217. The cubic root of 49171387 is about 366.3567122565.

The spelling of 49171387 in words is "forty-nine million, one hundred seventy-one thousand, three hundred eighty-seven".