143226749 has 2 divisors, whose sum is σ = 143226750. Its totient is φ = 143226748.

The previous prime is 143226739. The next prime is 143226757. The reversal of 143226749 is 947622341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106708900 + 36517849 = 10330^2 + 6043^2 .

It is an emirp because it is prime and its reverse (947622341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143226749 - 2⁸ = 143226493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143226739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71613374 + 71613375.

It is an arithmetic number, because the mean of its divisors is an integer number (71613375).

Almost surely, 2^143226749 is an apocalyptic number.

It is an amenable number.

143226749 is a deficient number, since it is larger than the sum of its proper divisors (1).

143226749 is an equidigital number, since it uses as much as digits as its factorization.

143226749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 143226749 is about 11967.7378397089. The cubic root of 143226749 is about 523.2084042833.

The spelling of 143226749 in words is "one hundred forty-three million, two hundred twenty-six thousand, seven hundred forty-nine".