47980813 has 2 divisors, whose sum is σ = 47980814. Its totient is φ = 47980812.

The previous prime is 47980811. The next prime is 47980837. The reversal of 47980813 is 31808974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37982569 + 9998244 = 6163^2 + 3162^2 .

It is a cyclic number.

It is not a de Polignac number, because 47980813 - 2¹ = 47980811 is a prime.

It is a super-2 number, since 2×47980813² = 4604316832281938, which contains 22 as substring.

Together with 47980811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47980811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23990406 + 23990407.

It is an arithmetic number, because the mean of its divisors is an integer number (23990407).

Almost surely, 2^47980813 is an apocalyptic number.

It is an amenable number.

47980813 is a deficient number, since it is larger than the sum of its proper divisors (1).

47980813 is an equidigital number, since it uses as much as digits as its factorization.

47980813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 47980813 is about 6926.8183894195. The cubic root of 47980813 is about 363.3756883728.

The spelling of 47980813 in words is "forty-seven million, nine hundred eighty thousand, eight hundred thirteen".