143257399 has 2 divisors, whose sum is σ = 143257400. Its totient is φ = 143257398.

The previous prime is 143257343. The next prime is 143257421. The reversal of 143257399 is 993752341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143257399 - 2⁹ = 143256887 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143257199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71628699 + 71628700.

It is an arithmetic number, because the mean of its divisors is an integer number (71628700).

Almost surely, 2^143257399 is an apocalyptic number.

143257399 is a deficient number, since it is larger than the sum of its proper divisors (1).

143257399 is an equidigital number, since it uses as much as digits as its factorization.

143257399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 143257399 is about 11969.0182972540. The cubic root of 143257399 is about 523.2457231825.

The spelling of 143257399 in words is "one hundred forty-three million, two hundred fifty-seven thousand, three hundred ninety-nine".