143189197 has 2 divisors, whose sum is σ = 143189198. Its totient is φ = 143189196.

The previous prime is 143189177. The next prime is 143189239. The reversal of 143189197 is 791981341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119705481 + 23483716 = 10941^2 + 4846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143189197 is a prime.

It is a super-2 number, since 2×143189197² = 41006292275009618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143189177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71594598 + 71594599.

It is an arithmetic number, because the mean of its divisors is an integer number (71594599).

Almost surely, 2^143189197 is an apocalyptic number.

It is an amenable number.

143189197 is a deficient number, since it is larger than the sum of its proper divisors (1).

143189197 is an equidigital number, since it uses as much as digits as its factorization.

143189197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 143189197 is about 11966.1688522267. The cubic root of 143189197 is about 523.1626743725.

The spelling of 143189197 in words is "one hundred forty-three million, one hundred eighty-nine thousand, one hundred ninety-seven".