143909461 has 2 divisors, whose sum is σ = 143909462. Its totient is φ = 143909460.

The previous prime is 143909417. The next prime is 143909473. The reversal of 143909461 is 164909341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123343236 + 20566225 = 11106^2 + 4535^2 .

It is a cyclic number.

It is not a de Polignac number, because 143909461 - 2⁷ = 143909333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143909461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143609461) 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, 71954730 + 71954731.

It is an arithmetic number, because the mean of its divisors is an integer number (71954731).

Almost surely, 2^143909461 is an apocalyptic number.

It is an amenable number.

143909461 is a deficient number, since it is larger than the sum of its proper divisors (1).

143909461 is an equidigital number, since it uses as much as digits as its factorization.

143909461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 143909461 is about 11996.2269485034. The cubic root of 143909461 is about 524.0384042808.

The spelling of 143909461 in words is "one hundred forty-three million, nine hundred nine thousand, four hundred sixty-one".