47303721 has 24 divisors (see below), whose sum is σ = 69576936. Its totient is φ = 30965760.

The previous prime is 47303717. The next prime is 47303747. The reversal of 47303721 is 12730374.

It can be written as a sum of positive squares in 4 ways, for example, as 189225 + 47114496 = 435^2 + 6864^2 .

It is not a de Polignac number, because 47303721 - 2² = 47303717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47303701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196161 + ... + 196401.

It is an arithmetic number, because the mean of its divisors is an integer number (2899039).

Almost surely, 2^47303721 is an apocalyptic number.

It is an amenable number.

47303721 is a deficient number, since it is larger than the sum of its proper divisors (22273215).

47303721 is a wasteful number, since it uses less digits than its factorization.

47303721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 47303721 is about 6877.7700601285. The cubic root of 47303721 is about 361.6582985834.

The spelling of 47303721 in words is "forty-seven million, three hundred three thousand, seven hundred twenty-one".