49873561 has 2 divisors, whose sum is σ = 49873562. Its totient is φ = 49873560.

The previous prime is 49873559. The next prime is 49873643. The reversal of 49873561 is 16537894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34152336 + 15721225 = 5844^2 + 3965^2 .

It is a cyclic number.

It is not a de Polignac number, because 49873561 - 2¹ = 49873559 is a prime.

Together with 49873559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49873501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24936780 + 24936781.

It is an arithmetic number, because the mean of its divisors is an integer number (24936781).

Almost surely, 2^49873561 is an apocalyptic number.

It is an amenable number.

49873561 is a deficient number, since it is larger than the sum of its proper divisors (1).

49873561 is an equidigital number, since it uses as much as digits as its factorization.

49873561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 49873561 is about 7062.1215650823. The cubic root of 49873561 is about 368.0923508968.

The spelling of 49873561 in words is "forty-nine million, eight hundred seventy-three thousand, five hundred sixty-one".