47497988891 has 2 divisors, whose sum is σ = 47497988892. Its totient is φ = 47497988890.

The previous prime is 47497988803. The next prime is 47497988903. The reversal of 47497988891 is 19888979474.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47497988891 is a prime.

It is not a weakly prime, because it can be changed into another prime (47497988801) 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, 23748994445 + 23748994446.

It is an arithmetic number, because the mean of its divisors is an integer number (23748994446).

Almost surely, 2^47497988891 is an apocalyptic number.

47497988891 is a deficient number, since it is larger than the sum of its proper divisors (1).

47497988891 is an equidigital number, since it uses as much as digits as its factorization.

47497988891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 292626432, while the sum is 74.

The spelling of 47497988891 in words is "forty-seven billion, four hundred ninety-seven million, nine hundred eighty-eight thousand, eight hundred ninety-one".