47012509 has 8 divisors (see below), whose sum is σ = 48992760. Its totient is φ = 45056256.

The previous prime is 47012507. The next prime is 47012513. The reversal of 47012509 is 90521074.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20520900 + 26491609 = 4530^2 + 5147^2 .

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

It is not a de Polignac number, because 47012509 - 2¹ = 47012507 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47012501) 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, 1944 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (6124095).

Almost surely, 2^47012509 is an apocalyptic number.

It is an amenable number.

47012509 is a deficient number, since it is larger than the sum of its proper divisors (1980251).

47012509 is a wasteful number, since it uses less digits than its factorization.

47012509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 47012509 is about 6856.5668522957. The cubic root of 47012509 is about 360.9146213480.

The spelling of 47012509 in words is "forty-seven million, twelve thousand, five hundred nine".