49782517 has 4 divisors (see below), whose sum is σ = 49822720. Its totient is φ = 49742316.

The previous prime is 49782479. The next prime is 49782521. The reversal of 49782517 is 71528794.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71528794 = 2 ⋅35764397.

It is a cyclic number.

It is not a de Polignac number, because 49782517 - 2⁷ = 49782389 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 (49782617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18183 + ... + 20740.

It is an arithmetic number, because the mean of its divisors is an integer number (12455680).

Almost surely, 2^49782517 is an apocalyptic number.

It is an amenable number.

49782517 is a deficient number, since it is larger than the sum of its proper divisors (40203).

49782517 is a wasteful number, since it uses less digits than its factorization.

49782517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40202.

The product of its digits is 141120, while the sum is 43.

The square root of 49782517 is about 7055.6726823174. The cubic root of 49782517 is about 367.8682307257.

The spelling of 49782517 in words is "forty-nine million, seven hundred eighty-two thousand, five hundred seventeen".