73143437 has 2 divisors, whose sum is σ = 73143438. Its totient is φ = 73143436.

The previous prime is 73143409. The next prime is 73143449. The reversal of 73143437 is 73434137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37871716 + 35271721 = 6154^2 + 5939^2 .

It is a cyclic number.

It is not a de Polignac number, because 73143437 - 2¹⁰ = 73142413 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 (73143337) 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, 36571718 + 36571719.

It is an arithmetic number, because the mean of its divisors is an integer number (36571719).

Almost surely, 2^73143437 is an apocalyptic number.

It is an amenable number.

73143437 is a deficient number, since it is larger than the sum of its proper divisors (1).

73143437 is an equidigital number, since it uses as much as digits as its factorization.

73143437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 32.

The square root of 73143437 is about 8552.3936415485. The cubic root of 73143437 is about 418.2074719998.

The spelling of 73143437 in words is "seventy-three million, one hundred forty-three thousand, four hundred thirty-seven".