2078398193 has 4 divisors (see below), whose sum is σ = 2145443328. Its totient is φ = 2011353060.

The previous prime is 2078398181. The next prime is 2078398207. The reversal of 2078398193 is 3918938702.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2078398193 - 2¹⁶ = 2078332657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078398793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33522521 + ... + 33522582.

It is an arithmetic number, because the mean of its divisors is an integer number (536360832).

Almost surely, 2^2078398193 is an apocalyptic number.

It is an amenable number.

2078398193 is a deficient number, since it is larger than the sum of its proper divisors (67045135).

2078398193 is an equidigital number, since it uses as much as digits as its factorization.

2078398193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67045134.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 2078398193 is about 45589.4526508051. The cubic root of 2078398193 is about 1276.1730980551.

The spelling of 2078398193 in words is "two billion, seventy-eight million, three hundred ninety-eight thousand, one hundred ninety-three".