47951779 has 2 divisors, whose sum is σ = 47951780. Its totient is φ = 47951778.

The previous prime is 47951777. The next prime is 47951789. The reversal of 47951779 is 97715974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47951779 - 2¹ = 47951777 is a prime.

Together with 47951777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47951777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23975889 + 23975890.

It is an arithmetic number, because the mean of its divisors is an integer number (23975890).

Almost surely, 2^47951779 is an apocalyptic number.

47951779 is a deficient number, since it is larger than the sum of its proper divisors (1).

47951779 is an equidigital number, since it uses as much as digits as its factorization.

47951779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 49.

The square root of 47951779 is about 6924.7223049015. The cubic root of 47951779 is about 363.3023786626.

The spelling of 47951779 in words is "forty-seven million, nine hundred fifty-one thousand, seven hundred seventy-nine".