49988513 has 2 divisors, whose sum is σ = 49988514. Its totient is φ = 49988512.

The previous prime is 49988509. The next prime is 49988531. The reversal of 49988513 is 31588994.

Together with next prime (49988531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42081169 + 7907344 = 6487^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 49988513 - 2² = 49988509 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49988573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24994256 + 24994257.

It is an arithmetic number, because the mean of its divisors is an integer number (24994257).

Almost surely, 2^49988513 is an apocalyptic number.

It is an amenable number.

49988513 is a deficient number, since it is larger than the sum of its proper divisors (1).

49988513 is an equidigital number, since it uses as much as digits as its factorization.

49988513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 47.

The square root of 49988513 is about 7070.2555116488. The cubic root of 49988513 is about 368.3749353900.

The spelling of 49988513 in words is "forty-nine million, nine hundred eighty-eight thousand, five hundred thirteen".