49813681 has 2 divisors, whose sum is σ = 49813682. Its totient is φ = 49813680.

The previous prime is 49813679. The next prime is 49813739. The reversal of 49813681 is 18631894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38192400 + 11621281 = 6180^2 + 3409^2 .

It is a cyclic number.

It is not a de Polignac number, because 49813681 - 2¹ = 49813679 is a prime.

It is a super-2 number, since 2×49813681² = 4962805629539522, which contains 22 as substring.

Together with 49813679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49813601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24906840 + 24906841.

It is an arithmetic number, because the mean of its divisors is an integer number (24906841).

Almost surely, 2^49813681 is an apocalyptic number.

It is an amenable number.

49813681 is a deficient number, since it is larger than the sum of its proper divisors (1).

49813681 is an equidigital number, since it uses as much as digits as its factorization.

49813681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 49813681 is about 7057.8807725832. The cubic root of 49813681 is about 367.9449769065.

The spelling of 49813681 in words is "forty-nine million, eight hundred thirteen thousand, six hundred eighty-one".