43147997 has 2 divisors, whose sum is σ = 43147998. Its totient is φ = 43147996.

The previous prime is 43147981. The next prime is 43147999. The reversal of 43147997 is 79974134.

It is a happy number.

43147997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40819321 + 2328676 = 6389^2 + 1526^2 .

It is a cyclic number.

It is not a de Polignac number, because 43147997 - 2⁴ = 43147981 is a prime.

It is a super-2 number, since 2×43147997² = 3723499290224018, which contains 22 as substring.

Together with 43147999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43147999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21573998 + 21573999.

It is an arithmetic number, because the mean of its divisors is an integer number (21573999).

Almost surely, 2^43147997 is an apocalyptic number.

It is an amenable number.

43147997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43147997 is an equidigital number, since it uses as much as digits as its factorization.

43147997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 43147997 is about 6568.7134965684. The cubic root of 43147997 is about 350.7412778915.

It can be divided in two parts, 43147 and 997, that added together give a palindrome (44144).

The spelling of 43147997 in words is "forty-three million, one hundred forty-seven thousand, nine hundred ninety-seven".