47726521 has 2 divisors, whose sum is σ = 47726522. Its totient is φ = 47726520.

The previous prime is 47726519. The next prime is 47726543. The reversal of 47726521 is 12562774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39200121 + 8526400 = 6261^2 + 2920^2 .

It is a cyclic number.

It is not a de Polignac number, because 47726521 - 2¹ = 47726519 is a prime.

Together with 47726519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47726551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23863260 + 23863261.

It is an arithmetic number, because the mean of its divisors is an integer number (23863261).

Almost surely, 2^47726521 is an apocalyptic number.

It is an amenable number.

47726521 is a deficient number, since it is larger than the sum of its proper divisors (1).

47726521 is an equidigital number, since it uses as much as digits as its factorization.

47726521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 34.

The square root of 47726521 is about 6908.4383908377. The cubic root of 47726521 is about 362.7326031526.

The spelling of 47726521 in words is "forty-seven million, seven hundred twenty-six thousand, five hundred twenty-one".