47509805 has 8 divisors (see below), whose sum is σ = 65156352. Its totient is φ = 32578128.

The previous prime is 47509799. The next prime is 47509807. The reversal of 47509805 is 50890574.

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 47509805 - 2¹⁰ = 47508781 is a prime.

It is a super-2 number, since 2×47509805² = 4514363142276050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47509807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678677 + ... + 678746.

It is an arithmetic number, because the mean of its divisors is an integer number (8144544).

Almost surely, 2^47509805 is an apocalyptic number.

It is an amenable number.

47509805 is a deficient number, since it is larger than the sum of its proper divisors (17646547).

47509805 is a wasteful number, since it uses less digits than its factorization.

47509805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357435.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 47509805 is about 6892.7356688038. The cubic root of 47509805 is about 362.1827394573.

The spelling of 47509805 in words is "forty-seven million, five hundred nine thousand, eight hundred five".