78683834783 has 2 divisors, whose sum is σ = 78683834784. Its totient is φ = 78683834782.

The previous prime is 78683834741. The next prime is 78683834809. The reversal of 78683834783 is 38743838687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78683834783 - 2²⁰ = 78682786207 is a prime.

It is a super-2 number, since 2×78683834783² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78683837783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39341917391 + 39341917392.

It is an arithmetic number, because the mean of its divisors is an integer number (39341917392).

Almost surely, 2^78683834783 is an apocalyptic number.

78683834783 is a deficient number, since it is larger than the sum of its proper divisors (1).

78683834783 is an equidigital number, since it uses as much as digits as its factorization.

78683834783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130056192, while the sum is 65.

The spelling of 78683834783 in words is "seventy-eight billion, six hundred eighty-three million, eight hundred thirty-four thousand, seven hundred eighty-three".