49681319 has 2 divisors, whose sum is σ = 49681320. Its totient is φ = 49681318.

The previous prime is 49681309. The next prime is 49681367. The reversal of 49681319 is 91318694.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49681319 is a prime.

It is a super-2 number, since 2×49681319² = 4936466915159522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49681309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24840659 + 24840660.

It is an arithmetic number, because the mean of its divisors is an integer number (24840660).

Almost surely, 2^49681319 is an apocalyptic number.

49681319 is a deficient number, since it is larger than the sum of its proper divisors (1).

49681319 is an equidigital number, since it uses as much as digits as its factorization.

49681319 is an odious number, because the sum of its binary digits is odd.

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

The square root of 49681319 is about 7048.4976413417. The cubic root of 49681319 is about 367.6187938726.

Subtracting 49681319 from its reverse (91318694), we obtain a triangular number (41637375 = T₉₁₂₅).

The spelling of 49681319 in words is "forty-nine million, six hundred eighty-one thousand, three hundred nineteen".