47474729 has 2 divisors, whose sum is σ = 47474730. Its totient is φ = 47474728.

The previous prime is 47474717. The next prime is 47474731. The reversal of 47474729 is 92747474.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24482704 + 22992025 = 4948^2 + 4795^2 .

It is a cyclic number.

It is not a de Polignac number, because 47474729 - 2²⁰ = 46426153 is a prime.

Together with 47474731, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 47474729.

It is not a weakly prime, because it can be changed into another prime (47474029) 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 as a sum of consecutive naturals, namely, 23737364 + 23737365.

It is an arithmetic number, because the mean of its divisors is an integer number (23737365).

Almost surely, 2^47474729 is an apocalyptic number.

It is an amenable number.

47474729 is a deficient number, since it is larger than the sum of its proper divisors (1).

47474729 is an equidigital number, since it uses as much as digits as its factorization.

47474729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 44.

The square root of 47474729 is about 6890.1907811032. The cubic root of 47474729 is about 362.0935855837.

The spelling of 47474729 in words is "forty-seven million, four hundred seventy-four thousand, seven hundred twenty-nine".