2078378249 has 2 divisors, whose sum is σ = 2078378250. Its totient is φ = 2078378248.

The previous prime is 2078378227. The next prime is 2078378287. The reversal of 2078378249 is 9428738702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1788697849 + 289680400 = 42293^2 + 17020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2078378249 - 2¹² = 2078374153 is a prime.

It is a super-2 number, since 2×2078378249² = 8639312291832612002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2078378197 and 2078378206.

It is not a weakly prime, because it can be changed into another prime (2078378209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039189124 + 1039189125.

It is an arithmetic number, because the mean of its divisors is an integer number (1039189125).

Almost surely, 2^2078378249 is an apocalyptic number.

It is an amenable number.

2078378249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078378249 is an equidigital number, since it uses as much as digits as its factorization.

2078378249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 2078378249 is about 45589.2339154761. The cubic root of 2078378249 is about 1276.1690160529.

The spelling of 2078378249 in words is "two billion, seventy-eight million, three hundred seventy-eight thousand, two hundred forty-nine".