2293684378781 has 2 divisors, whose sum is σ = 2293684378782. Its totient is φ = 2293684378780.

The previous prime is 2293684378751. The next prime is 2293684378793. The reversal of 2293684378781 is 1878734863922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1870969851556 + 422714527225 = 1367834^2 + 650165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2293684378781 - 2⁶ = 2293684378717 is a prime.

It is a super-2 number, since 2×2293684378781² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2293684378751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1146842189390 + 1146842189391.

It is an arithmetic number, because the mean of its divisors is an integer number (1146842189391).

Almost surely, 2^{2293684378781} is an apocalyptic number.

It is an amenable number.

2293684378781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2293684378781 is an equidigital number, since it uses as much as digits as its factorization.

2293684378781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 195084288, while the sum is 68.

The spelling of 2293684378781 in words is "two trillion, two hundred ninety-three billion, six hundred eighty-four million, three hundred seventy-eight thousand, seven hundred eighty-one".