49815789 has 4 divisors (see below), whose sum is σ = 66421056. Its totient is φ = 33210524.

The previous prime is 49815781. The next prime is 49815811. The reversal of 49815789 is 98751894.

49815789 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 a cyclic number.

It is not a de Polignac number, because 49815789 - 2³ = 49815781 is a prime.

It is a super-2 number, since 2×49815789² = 4963225667385042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49815781) 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, 8302629 + ... + 8302634.

It is an arithmetic number, because the mean of its divisors is an integer number (16605264).

Almost surely, 2^49815789 is an apocalyptic number.

It is an amenable number.

49815789 is a deficient number, since it is larger than the sum of its proper divisors (16605267).

49815789 is a wasteful number, since it uses less digits than its factorization.

49815789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16605266.

The product of its digits is 725760, while the sum is 51.

The square root of 49815789 is about 7058.0301076150. The cubic root of 49815789 is about 367.9501670273.

The spelling of 49815789 in words is "forty-nine million, eight hundred fifteen thousand, seven hundred eighty-nine".