47693281 has 2 divisors, whose sum is σ = 47693282. Its totient is φ = 47693280.

The previous prime is 47693267. The next prime is 47693323. The reversal of 47693281 is 18239674.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 8755681 = 6240^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 47693281 - 2⁷ = 47693153 is a prime.

It is a super-2 number, since 2×47693281² = 4549298105089922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47693201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23846640 + 23846641.

It is an arithmetic number, because the mean of its divisors is an integer number (23846641).

Almost surely, 2^47693281 is an apocalyptic number.

It is an amenable number.

47693281 is a deficient number, since it is larger than the sum of its proper divisors (1).

47693281 is an equidigital number, since it uses as much as digits as its factorization.

47693281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 47693281 is about 6906.0322182857. The cubic root of 47693281 is about 362.6483730312.

It can be divided in two parts, 47693 and 281, that added together give a palindrome (47974).

The spelling of 47693281 in words is "forty-seven million, six hundred ninety-three thousand, two hundred eighty-one".