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43997 is a prime number
BaseRepresentation
bin1010101111011101
32020100112
422233131
52401442
6535405
7242162
oct125735
966315
1043997
1130068
1221565
1317045
1412069
15d082
hexabdd

43997 has 2 divisors, whose sum is σ = 43998. Its totient is φ = 43996.

The previous prime is 43991. The next prime is 44017. The reversal of 43997 is 79934.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32761 + 11236 = 181^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 43997 - 26 = 43933 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21998 + 21999.

It is an arithmetic number, because the mean of its divisors is an integer number (21999).

243997 is an apocalyptic number.

It is an amenable number.

43997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43997 is an equidigital number, since it uses as much as digits as its factorization.

43997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 32.

The square root of 43997 is about 209.7546185427. The cubic root of 43997 is about 35.3026809831.

Subtracting 43997 from its reverse (79934), we obtain a cube (35937 = 333).

The spelling of 43997 in words is "forty-three thousand, nine hundred ninety-seven".