2078378197 has 16 divisors (see below), whose sum is σ = 2524400640. Its totient is φ = 1670416128.

The previous prime is 2078378189. The next prime is 2078378201. The reversal of 2078378197 is 7918738702.

It is a cyclic number.

It is not a de Polignac number, because 2078378197 - 2³ = 2078378189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2078378147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453 + ... + 64474.

It is an arithmetic number, because the mean of its divisors is an integer number (157775040).

Almost surely, 2^2078378197 is an apocalyptic number.

It is an amenable number.

2078378197 is a deficient number, since it is larger than the sum of its proper divisors (446022443).

2078378197 is a wasteful number, since it uses less digits than its factorization.

2078378197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65220.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 2078378197 is about 45589.2333451660. The cubic root of 2078378197 is about 1276.1690054099.

The spelling of 2078378197 in words is "two billion, seventy-eight million, three hundred seventy-eight thousand, one hundred ninety-seven".