47681947 has 2 divisors, whose sum is σ = 47681948. Its totient is φ = 47681946.

The previous prime is 47681939. The next prime is 47681983. The reversal of 47681947 is 74918674.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47681947 - 2³ = 47681939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47681897 and 47681906.

It is not a weakly prime, because it can be changed into another prime (47681917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23840973 + 23840974.

It is an arithmetic number, because the mean of its divisors is an integer number (23840974).

Almost surely, 2^47681947 is an apocalyptic number.

47681947 is a deficient number, since it is larger than the sum of its proper divisors (1).

47681947 is an equidigital number, since it uses as much as digits as its factorization.

47681947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 47681947 is about 6905.2115825657. The cubic root of 47681947 is about 362.6196437413.

The spelling of 47681947 in words is "forty-seven million, six hundred eighty-one thousand, nine hundred forty-seven".