47447899 has 2 divisors, whose sum is σ = 47447900. Its totient is φ = 47447898.

The previous prime is 47447861. The next prime is 47447903. The reversal of 47447899 is 99874474.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47447899 is a prime.

It is not a weakly prime, because it can be changed into another prime (47447819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23723949 + 23723950.

It is an arithmetic number, because the mean of its divisors is an integer number (23723950).

Almost surely, 2^47447899 is an apocalyptic number.

47447899 is a deficient number, since it is larger than the sum of its proper divisors (1).

47447899 is an equidigital number, since it uses as much as digits as its factorization.

47447899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 52.

The square root of 47447899 is about 6888.2435351837. The cubic root of 47447899 is about 362.0253612056.

The spelling of 47447899 in words is "forty-seven million, four hundred forty-seven thousand, eight hundred ninety-nine".