47845513 has 2 divisors, whose sum is σ = 47845514. Its totient is φ = 47845512.

The previous prime is 47845487. The next prime is 47845517. The reversal of 47845513 is 31554874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27846729 + 19998784 = 5277^2 + 4472^2 .

It is a cyclic number.

It is not a de Polignac number, because 47845513 - 2⁹ = 47845001 is a prime.

It is a super-2 number, since 2×47845513² = 4578386228466338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47845517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23922756 + 23922757.

It is an arithmetic number, because the mean of its divisors is an integer number (23922757).

Almost surely, 2^47845513 is an apocalyptic number.

It is an amenable number.

47845513 is a deficient number, since it is larger than the sum of its proper divisors (1).

47845513 is an equidigital number, since it uses as much as digits as its factorization.

47845513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 47845513 is about 6917.0451061129. The cubic root of 47845513 is about 363.0338085468.

The spelling of 47845513 in words is "forty-seven million, eight hundred forty-five thousand, five hundred thirteen".