2078378287 has 2 divisors, whose sum is σ = 2078378288. Its totient is φ = 2078378286.

The previous prime is 2078378249. The next prime is 2078378311. The reversal of 2078378287 is 7828738702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2078378287 - 2¹⁵ = 2078345519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2078378227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039189143 + 1039189144.

It is an arithmetic number, because the mean of its divisors is an integer number (1039189144).

Almost surely, 2^2078378287 is an apocalyptic number.

2078378287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078378287 is an equidigital number, since it uses as much as digits as its factorization.

2078378287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 52.

The square root of 2078378287 is about 45589.2343322412. The cubic root of 2078378287 is about 1276.1690238305.

The spelling of 2078378287 in words is "two billion, seventy-eight million, three hundred seventy-eight thousand, two hundred eighty-seven".