1940258197 has 2 divisors, whose sum is σ = 1940258198. Its totient is φ = 1940258196.

The previous prime is 1940258191. The next prime is 1940258213. The reversal of 1940258197 is 7918520491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1709491716 + 230766481 = 41346^2 + 15191^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940258197 - 2³ = 1940258189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940258191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970129098 + 970129099.

It is an arithmetic number, because the mean of its divisors is an integer number (970129099).

Almost surely, 2^1940258197 is an apocalyptic number.

It is an amenable number.

1940258197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940258197 is an equidigital number, since it uses as much as digits as its factorization.

1940258197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 1940258197 is about 44048.3620240299. The cubic root of 1940258197 is about 1247.2490322090.

The spelling of 1940258197 in words is "one billion, nine hundred forty million, two hundred fifty-eight thousand, one hundred ninety-seven".