49781823 has 40 divisors (see below), whose sum is σ = 83169408. Its totient is φ = 25942176.

The previous prime is 49781819. The next prime is 49781833. The reversal of 49781823 is 32818794.

It is not a de Polignac number, because 49781823 - 2² = 49781819 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49781803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 599740 + ... + 599822.

Almost surely, 2^49781823 is an apocalyptic number.

49781823 is a deficient number, since it is larger than the sum of its proper divisors (33387585).

49781823 is an frugal number, since it uses more digits than its factorization.

49781823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 106 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 49781823 is about 7055.6235018601. The cubic root of 49781823 is about 367.8665212786.

The spelling of 49781823 in words is "forty-nine million, seven hundred eighty-one thousand, eight hundred twenty-three".