1778130313 has 2 divisors, whose sum is σ = 1778130314. Its totient is φ = 1778130312.

The previous prime is 1778130301. The next prime is 1778130323. The reversal of 1778130313 is 3130318771.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1226960784 + 551169529 = 35028^2 + 23477^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1778130313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1778130323) 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, 889065156 + 889065157.

It is an arithmetic number, because the mean of its divisors is an integer number (889065157).

Almost surely, 2^1778130313 is an apocalyptic number.

It is an amenable number.

1778130313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1778130313 is an equidigital number, since it uses as much as digits as its factorization.

1778130313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1778130313 is about 42167.8824818131. The cubic root of 1778130313 is about 1211.4937981389.

The spelling of 1778130313 in words is "one billion, seven hundred seventy-eight million, one hundred thirty thousand, three hundred thirteen".