4278703861 has 2 divisors, whose sum is σ = 4278703862. Its totient is φ = 4278703860.

The previous prime is 4278703859. The next prime is 4278703889. The reversal of 4278703861 is 1683078724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4226950225 + 51753636 = 65015^2 + 7194^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278703861 - 2¹ = 4278703859 is a prime.

Together with 4278703859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278703801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139351930 + 2139351931.

It is an arithmetic number, because the mean of its divisors is an integer number (2139351931).

Almost surely, 2^4278703861 is an apocalyptic number.

It is an amenable number.

4278703861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278703861 is an equidigital number, since it uses as much as digits as its factorization.

4278703861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 4278703861 is about 65411.8021537398. The cubic root of 4278703861 is about 1623.4443635176. Note that the first 3 decimals are identical.

The spelling of 4278703861 in words is "four billion, two hundred seventy-eight million, seven hundred three thousand, eight hundred sixty-one".