47351947 has 4 divisors (see below), whose sum is σ = 47407680. Its totient is φ = 47296216.

The previous prime is 47351929. The next prime is 47351951. The reversal of 47351947 is 74915374.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47351947 - 2¹⁵ = 47319179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47351957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26572 + ... + 28297.

It is an arithmetic number, because the mean of its divisors is an integer number (11851920).

Almost surely, 2^47351947 is an apocalyptic number.

47351947 is a deficient number, since it is larger than the sum of its proper divisors (55733).

47351947 is an equidigital number, since it uses as much as digits as its factorization.

47351947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55732.

The product of its digits is 105840, while the sum is 40.

The square root of 47351947 is about 6881.2750998634. The cubic root of 47351947 is about 361.7811600198.

The spelling of 47351947 in words is "forty-seven million, three hundred fifty-one thousand, nine hundred forty-seven".