47775913 has 2 divisors, whose sum is σ = 47775914. Its totient is φ = 47775912.

The previous prime is 47775883. The next prime is 47775943. The reversal of 47775913 is 31957774.

It is a balanced prime because it is at equal distance from previous prime (47775883) and next prime (47775943).

It can be written as a sum of positive squares in only one way, i.e., 47775744 + 169 = 6912^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 47775913 - 2⁹ = 47775401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47775913.

It is not a weakly prime, because it can be changed into another prime (47775943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23887956 + 23887957.

It is an arithmetic number, because the mean of its divisors is an integer number (23887957).

Almost surely, 2^47775913 is an apocalyptic number.

It is an amenable number.

47775913 is a deficient number, since it is larger than the sum of its proper divisors (1).

47775913 is an equidigital number, since it uses as much as digits as its factorization.

47775913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 43.

The square root of 47775913 is about 6912.0122251049. The cubic root of 47775913 is about 362.8576902215.

The spelling of 47775913 in words is "forty-seven million, seven hundred seventy-five thousand, nine hundred thirteen".