47951999 has 2 divisors, whose sum is σ = 47952000. Its totient is φ = 47951998.

The previous prime is 47951971. The next prime is 47952007. The reversal of 47951999 is 99915974.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47951999 - 2¹² = 47947903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47951999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47951399) 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, 23975999 + 23976000.

It is an arithmetic number, because the mean of its divisors is an integer number (23976000).

Almost surely, 2^47951999 is an apocalyptic number.

47951999 is a deficient number, since it is larger than the sum of its proper divisors (1).

47951999 is an equidigital number, since it uses as much as digits as its factorization.

47951999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 53.

The square root of 47951999 is about 6924.7381899968. The cubic root of 47951999 is about 363.3029342652.

The spelling of 47951999 in words is "forty-seven million, nine hundred fifty-one thousand, nine hundred ninety-nine".