397743193 has 2 divisors, whose sum is σ = 397743194. Its totient is φ = 397743192.

The previous prime is 397743121. The next prime is 397743233. The reversal of 397743193 is 391347793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343101529 + 54641664 = 18523^2 + 7392^2 .

It is a cyclic number.

It is not a de Polignac number, because 397743193 - 2¹³ = 397735001 is a prime.

It is the 19944-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (397743293) by changing a digit.

It is a nontrivial repunit in base 19943.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198871596 + 198871597.

It is an arithmetic number, because the mean of its divisors is an integer number (198871597).

Almost surely, 2^397743193 is an apocalyptic number.

It is an amenable number.

397743193 is a deficient number, since it is larger than the sum of its proper divisors (1).

397743193 is an equidigital number, since it uses as much as digits as its factorization.

397743193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 46.

The square root of 397743193 is about 19943.5000188031. The cubic root of 397743193 is about 735.4179941514.

It can be divided in two parts, 397 and 743193, that added together give a triangular number (743590 = T₁₂₁₉).

The spelling of 397743193 in words is "three hundred ninety-seven million, seven hundred forty-three thousand, one hundred ninety-three".