143890961 has 2 divisors, whose sum is σ = 143890962. Its totient is φ = 143890960.

The previous prime is 143890951. The next prime is 143890969. The reversal of 143890961 is 169098341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82174225 + 61716736 = 9065^2 + 7856^2 .

It is a cyclic number.

It is not a de Polignac number, because 143890961 - 2²² = 139696657 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (143890969) 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, 71945480 + 71945481.

It is an arithmetic number, because the mean of its divisors is an integer number (71945481).

Almost surely, 2^143890961 is an apocalyptic number.

It is an amenable number.

143890961 is a deficient number, since it is larger than the sum of its proper divisors (1).

143890961 is an equidigital number, since it uses as much as digits as its factorization.

143890961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 143890961 is about 11995.4558479451. The cubic root of 143890961 is about 524.0159477403.

The spelling of 143890961 in words is "one hundred forty-three million, eight hundred ninety thousand, nine hundred sixty-one".