47128397 has 2 divisors, whose sum is σ = 47128398. Its totient is φ = 47128396.

The previous prime is 47128391. The next prime is 47128409. The reversal of 47128397 is 79382174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44970436 + 2157961 = 6706^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 47128397 - 2⁴ = 47128381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47128391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23564198 + 23564199.

It is an arithmetic number, because the mean of its divisors is an integer number (23564199).

Almost surely, 2^47128397 is an apocalyptic number.

It is an amenable number.

47128397 is a deficient number, since it is larger than the sum of its proper divisors (1).

47128397 is an equidigital number, since it uses as much as digits as its factorization.

47128397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 47128397 is about 6865.0125273010. The cubic root of 47128397 is about 361.2109350605.

The spelling of 47128397 in words is "forty-seven million, one hundred twenty-eight thousand, three hundred ninety-seven".