49518457 has 4 divisors (see below), whose sum is σ = 51226020. Its totient is φ = 47810896.

The previous prime is 49518451. The next prime is 49518463. The reversal of 49518457 is 75481594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75481594 = 2 ⋅37740797.

It is an interprime number because it is at equal distance from previous prime (49518451) and next prime (49518463).

It can be written as a sum of positive squares in 2 ways, for example, as 34857216 + 14661241 = 5904^2 + 3829^2 .

It is a cyclic number.

It is not a de Polignac number, because 49518457 - 2³ = 49518449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49518451) 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, 853738 + ... + 853795.

It is an arithmetic number, because the mean of its divisors is an integer number (12806505).

Almost surely, 2^49518457 is an apocalyptic number.

It is an amenable number.

49518457 is a deficient number, since it is larger than the sum of its proper divisors (1707563).

49518457 is a wasteful number, since it uses less digits than its factorization.

49518457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707562.

The product of its digits is 201600, while the sum is 43.

The square root of 49518457 is about 7036.9351993606. The cubic root of 49518457 is about 367.2166529574.

The spelling of 49518457 in words is "forty-nine million, five hundred eighteen thousand, four hundred fifty-seven".