73257143 has 2 divisors, whose sum is σ = 73257144. Its totient is φ = 73257142.

The previous prime is 73257137. The next prime is 73257167. The reversal of 73257143 is 34175237.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73257143 - 2⁴ = 73257127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73257113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36628571 + 36628572.

It is an arithmetic number, because the mean of its divisors is an integer number (36628572).

Almost surely, 2^73257143 is an apocalyptic number.

73257143 is a deficient number, since it is larger than the sum of its proper divisors (1).

73257143 is an equidigital number, since it uses as much as digits as its factorization.

73257143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 73257143 is about 8559.0386726548. The cubic root of 73257143 is about 418.4240696005.

It can be divided in two parts, 732 and 57143, that added together give a palindrome (57875).

The spelling of 73257143 in words is "seventy-three million, two hundred fifty-seven thousand, one hundred forty-three".