47937509 has 6 divisors (see below), whose sum is σ = 48981414. Its totient is φ = 46915400.

The previous prime is 47937503. The next prime is 47937511. The reversal of 47937509 is 90573974.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 1493284 = 6815^2 + 1222^2 .

It is not a de Polignac number, because 47937509 - 2¹⁶ = 47871973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47937509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47937503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8642 + ... + 13059.

It is an arithmetic number, because the mean of its divisors is an integer number (8163569).

Almost surely, 2^47937509 is an apocalyptic number.

It is an amenable number.

47937509 is a deficient number, since it is larger than the sum of its proper divisors (1043905).

47937509 is an equidigital number, since it uses as much as digits as its factorization.

47937509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21795 (or 21748 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 47937509 is about 6923.6918620054. The cubic root of 47937509 is about 363.2663366262.

The spelling of 47937509 in words is "forty-seven million, nine hundred thirty-seven thousand, five hundred nine".