47109487 has 2 divisors, whose sum is σ = 47109488. Its totient is φ = 47109486.

The previous prime is 47109481. The next prime is 47109511. The reversal of 47109487 is 78490174.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47109487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47109481) 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, 23554743 + 23554744.

It is an arithmetic number, because the mean of its divisors is an integer number (23554744).

Almost surely, 2^47109487 is an apocalyptic number.

47109487 is a deficient number, since it is larger than the sum of its proper divisors (1).

47109487 is an equidigital number, since it uses as much as digits as its factorization.

47109487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 47109487 is about 6863.6351155929. The cubic root of 47109487 is about 361.1626173229.

The spelling of 47109487 in words is "forty-seven million, one hundred nine thousand, four hundred eighty-seven".