49891613 has 2 divisors, whose sum is σ = 49891614. Its totient is φ = 49891612.

The previous prime is 49891573. The next prime is 49891691. The reversal of 49891613 is 31619894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45738169 + 4153444 = 6763^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 49891613 - 2⁸ = 49891357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49891693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24945806 + 24945807.

It is an arithmetic number, because the mean of its divisors is an integer number (24945807).

Almost surely, 2^49891613 is an apocalyptic number.

It is an amenable number.

49891613 is a deficient number, since it is larger than the sum of its proper divisors (1).

49891613 is an equidigital number, since it uses as much as digits as its factorization.

49891613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 49891613 is about 7063.3995356344. The cubic root of 49891613 is about 368.1367565327.

The spelling of 49891613 in words is "forty-nine million, eight hundred ninety-one thousand, six hundred thirteen".