47851807 has 2 divisors, whose sum is σ = 47851808. Its totient is φ = 47851806.

The previous prime is 47851789. The next prime is 47851813. The reversal of 47851807 is 70815874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47851807 - 2¹⁹ = 47327519 is a prime.

It is a Chen prime.

It is the 6918-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 47851807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47851847) by changing a digit.

It is a nontrivial repunit in base 6917.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23925903 + 23925904.

It is an arithmetic number, because the mean of its divisors is an integer number (23925904).

Almost surely, 2^47851807 is an apocalyptic number.

47851807 is a deficient number, since it is larger than the sum of its proper divisors (1).

47851807 is an equidigital number, since it uses as much as digits as its factorization.

47851807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 47851807 is about 6917.5000542103. The cubic root of 47851807 is about 363.0497266860.

The spelling of 47851807 in words is "forty-seven million, eight hundred fifty-one thousand, eight hundred seven".