4278090197 has 2 divisors, whose sum is σ = 4278090198. Its totient is φ = 4278090196.

The previous prime is 4278090169. The next prime is 4278090209. The reversal of 4278090197 is 7910908724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3058753636 + 1219336561 = 55306^2 + 34919^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278090197 - 2⁶ = 4278090133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278090107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139045098 + 2139045099.

It is an arithmetic number, because the mean of its divisors is an integer number (2139045099).

Almost surely, 2^4278090197 is an apocalyptic number.

It is an amenable number.

4278090197 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278090197 is an equidigital number, since it uses as much as digits as its factorization.

4278090197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 4278090197 is about 65407.1112112437. Note that the first 3 decimals coincide. The cubic root of 4278090197 is about 1623.3667467886.

The spelling of 4278090197 in words is "four billion, two hundred seventy-eight million, ninety thousand, one hundred ninety-seven".