47408513 has 2 divisors, whose sum is σ = 47408514. Its totient is φ = 47408512.

The previous prime is 47408479. The next prime is 47408519. The reversal of 47408513 is 31580474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46471489 + 937024 = 6817^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 47408513 - 2¹² = 47404417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47408513.

It is not a weakly prime, because it can be changed into another prime (47408519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23704256 + 23704257.

It is an arithmetic number, because the mean of its divisors is an integer number (23704257).

Almost surely, 2^47408513 is an apocalyptic number.

It is an amenable number.

47408513 is a deficient number, since it is larger than the sum of its proper divisors (1).

47408513 is an equidigital number, since it uses as much as digits as its factorization.

47408513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 47408513 is about 6885.3840125297. The cubic root of 47408513 is about 361.9251623325.

Adding to 47408513 its reverse (31580474), we get a palindrome (78988987).

The spelling of 47408513 in words is "forty-seven million, four hundred eight thousand, five hundred thirteen".