143405623 has 2 divisors, whose sum is σ = 143405624. Its totient is φ = 143405622.

The previous prime is 143405543. The next prime is 143405699. The reversal of 143405623 is 326504341.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143405623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 143405591 and 143405600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143405723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71702811 + 71702812.

It is an arithmetic number, because the mean of its divisors is an integer number (71702812).

Almost surely, 2^143405623 is an apocalyptic number.

143405623 is a deficient number, since it is larger than the sum of its proper divisors (1).

143405623 is an equidigital number, since it uses as much as digits as its factorization.

143405623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 143405623 is about 11975.2086829416. The cubic root of 143405623 is about 523.4261230342.

Adding to 143405623 its reverse (326504341), we get a palindrome (469909964).

The spelling of 143405623 in words is "one hundred forty-three million, four hundred five thousand, six hundred twenty-three".