49520831389 has 2 divisors, whose sum is σ = 49520831390. Its totient is φ = 49520831388.

The previous prime is 49520831387. The next prime is 49520831453. The reversal of 49520831389 is 98313802594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29162392900 + 20358438489 = 170770^2 + 142683^2 .

It is a cyclic number.

It is not a de Polignac number, because 49520831389 - 2¹ = 49520831387 is a prime.

Together with 49520831387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49520831383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24760415694 + 24760415695.

It is an arithmetic number, because the mean of its divisors is an integer number (24760415695).

Almost surely, 2^49520831389 is an apocalyptic number.

It is an amenable number.

49520831389 is a deficient number, since it is larger than the sum of its proper divisors (1).

49520831389 is an equidigital number, since it uses as much as digits as its factorization.

49520831389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 49520831389 in words is "forty-nine billion, five hundred twenty million, eight hundred thirty-one thousand, three hundred eighty-nine".