47291905 has 8 divisors (see below), whose sum is σ = 56812392. Its totient is φ = 37792128.

The previous prime is 47291899. The next prime is 47291929. The reversal of 47291905 is 50919274.

It can be written as a sum of positive squares in 4 ways, for example, as 2455489 + 44836416 = 1567^2 + 6696^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47291905 - 2¹³ = 47283713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 397 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (7101549).

Almost surely, 2^47291905 is an apocalyptic number.

It is an amenable number.

47291905 is a deficient number, since it is larger than the sum of its proper divisors (9520487).

47291905 is a wasteful number, since it uses less digits than its factorization.

47291905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10355.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 47291905 is about 6876.9110071310. The cubic root of 47291905 is about 361.6281831913.

The spelling of 47291905 in words is "forty-seven million, two hundred ninety-one thousand, nine hundred five".