2391778063 has 2 divisors, whose sum is σ = 2391778064. Its totient is φ = 2391778062.

The previous prime is 2391778033. The next prime is 2391778099. The reversal of 2391778063 is 3608771932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391778063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391778003) 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 as a sum of consecutive naturals, namely, 1195889031 + 1195889032.

It is an arithmetic number, because the mean of its divisors is an integer number (1195889032).

Almost surely, 2^2391778063 is an apocalyptic number.

2391778063 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391778063 is an equidigital number, since it uses as much as digits as its factorization.

2391778063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 2391778063 is about 48905.8080702078. The cubic root of 2391778063 is about 1337.3352521683.

The spelling of 2391778063 in words is "two billion, three hundred ninety-one million, seven hundred seventy-eight thousand, sixty-three".