49787131 has 2 divisors, whose sum is σ = 49787132. Its totient is φ = 49787130.

The previous prime is 49787081. The next prime is 49787183. The reversal of 49787131 is 13178794.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49787131 - 2¹⁵ = 49754363 is a prime.

It is a super-2 number, since 2×49787131² = 4957516826422322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49787191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24893565 + 24893566.

It is an arithmetic number, because the mean of its divisors is an integer number (24893566).

Almost surely, 2^49787131 is an apocalyptic number.

49787131 is a deficient number, since it is larger than the sum of its proper divisors (1).

49787131 is an equidigital number, since it uses as much as digits as its factorization.

49787131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 49787131 is about 7055.9996456916. Note that the first 3 decimals coincide. The cubic root of 49787131 is about 367.8795954355.

The spelling of 49787131 in words is "forty-nine million, seven hundred eighty-seven thousand, one hundred thirty-one".