49506781 has 4 divisors (see below), whose sum is σ = 49562272. Its totient is φ = 49451292.

The previous prime is 49506773. The next prime is 49506791. The reversal of 49506781 is 18760594.

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 a cyclic number.

It is not a de Polignac number, because 49506781 - 2³ = 49506773 is a prime.

It is a super-2 number, since 2×49506781² = 4901842729963922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49506791) 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, 26385 + ... + 28198.

It is an arithmetic number, because the mean of its divisors is an integer number (12390568).

Almost surely, 2^49506781 is an apocalyptic number.

It is an amenable number.

49506781 is a deficient number, since it is larger than the sum of its proper divisors (55491).

49506781 is an equidigital number, since it uses as much as digits as its factorization.

49506781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55490.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 49506781 is about 7036.1055279181. The cubic root of 49506781 is about 367.1877885774.

The spelling of 49506781 in words is "forty-nine million, five hundred six thousand, seven hundred eighty-one".