143869993 has 2 divisors, whose sum is σ = 143869994. Its totient is φ = 143869992.

The previous prime is 143869951. The next prime is 143870003. The reversal of 143869993 is 399968341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116380944 + 27489049 = 10788^2 + 5243^2 .

It is a cyclic number.

It is not a de Polignac number, because 143869993 - 2¹³ = 143861801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143869993.

It is not a weakly prime, because it can be changed into another prime (143864993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71934996 + 71934997.

It is an arithmetic number, because the mean of its divisors is an integer number (71934997).

Almost surely, 2^143869993 is an apocalyptic number.

It is an amenable number.

143869993 is a deficient number, since it is larger than the sum of its proper divisors (1).

143869993 is an equidigital number, since it uses as much as digits as its factorization.

143869993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 52.

The square root of 143869993 is about 11994.5818184712. The cubic root of 143869993 is about 523.9904930486.

The spelling of 143869993 in words is "one hundred forty-three million, eight hundred sixty-nine thousand, nine hundred ninety-three".