51846397 has 2 divisors, whose sum is σ = 51846398. Its totient is φ = 51846396.

The previous prime is 51846391. The next prime is 51846407. The reversal of 51846397 is 79364815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37625956 + 14220441 = 6134^2 + 3771^2 .

It is a cyclic number.

It is not a de Polignac number, because 51846397 - 2¹¹ = 51844349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51846391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25923198 + 25923199.

It is an arithmetic number, because the mean of its divisors is an integer number (25923199).

Almost surely, 2^51846397 is an apocalyptic number.

It is an amenable number.

51846397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51846397 is an equidigital number, since it uses as much as digits as its factorization.

51846397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 51846397 is about 7200.4442224074. Note that the first 3 decimals coincide. The cubic root of 51846397 is about 372.8832372490.

The spelling of 51846397 in words is "fifty-one million, eight hundred forty-six thousand, three hundred ninety-seven".