47644397 has 2 divisors, whose sum is σ = 47644398. Its totient is φ = 47644396.

The previous prime is 47644391. The next prime is 47644439. The reversal of 47644397 is 79344674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46158436 + 1485961 = 6794^2 + 1219^2 .

It is a cyclic number.

It is not a de Polignac number, because 47644397 - 2¹⁴ = 47628013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47644391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23822198 + 23822199.

It is an arithmetic number, because the mean of its divisors is an integer number (23822199).

Almost surely, 2^47644397 is an apocalyptic number.

It is an amenable number.

47644397 is a deficient number, since it is larger than the sum of its proper divisors (1).

47644397 is an equidigital number, since it uses as much as digits as its factorization.

47644397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 44.

The square root of 47644397 is about 6902.4920861961. The cubic root of 47644397 is about 362.5244299033.

The spelling of 47644397 in words is "forty-seven million, six hundred forty-four thousand, three hundred ninety-seven".