143797481 has 2 divisors, whose sum is σ = 143797482. Its totient is φ = 143797480.

The previous prime is 143797469. The next prime is 143797501. The reversal of 143797481 is 184797341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142587481 + 1210000 = 11941^2 + 1100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143797481 is a prime.

It is a super-2 number, since 2×143797481² = 41355431083890722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143797421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71898740 + 71898741.

It is an arithmetic number, because the mean of its divisors is an integer number (71898741).

Almost surely, 2^143797481 is an apocalyptic number.

It is an amenable number.

143797481 is a deficient number, since it is larger than the sum of its proper divisors (1).

143797481 is an equidigital number, since it uses as much as digits as its factorization.

143797481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 143797481 is about 11991.5587393800. The cubic root of 143797481 is about 523.9024460023.

The spelling of 143797481 in words is "one hundred forty-three million, seven hundred ninety-seven thousand, four hundred eighty-one".