47205905 has 4 divisors (see below), whose sum is σ = 56647092. Its totient is φ = 37764720.

The previous prime is 47205871. The next prime is 47205911. The reversal of 47205905 is 50950274.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 31460881 = 3968^2 + 5609^2 .

It is not a de Polignac number, because 47205905 - 2¹⁰ = 47204881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720586 + ... + 4720595.

It is an arithmetic number, because the mean of its divisors is an integer number (14161773).

Almost surely, 2^47205905 is an apocalyptic number.

It is an amenable number.

47205905 is a deficient number, since it is larger than the sum of its proper divisors (9441187).

47205905 is an equidigital number, since it uses as much as digits as its factorization.

47205905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441186.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 47205905 is about 6870.6553544767. The cubic root of 47205905 is about 361.4088440708.

The spelling of 47205905 in words is "forty-seven million, two hundred five thousand, nine hundred five".