840770741 has 2 divisors, whose sum is σ = 840770742. Its totient is φ = 840770740.

The previous prime is 840770719. The next prime is 840770743. The reversal of 840770741 is 147077048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 833534641 + 7236100 = 28871^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 840770741 - 2¹⁴ = 840754357 is a prime.

It is a Sophie Germain prime.

Together with 840770743, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 840770695 and 840770704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840770743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420385370 + 420385371.

It is an arithmetic number, because the mean of its divisors is an integer number (420385371).

Almost surely, 2^840770741 is an apocalyptic number.

It is an amenable number.

840770741 is a deficient number, since it is larger than the sum of its proper divisors (1).

840770741 is an equidigital number, since it uses as much as digits as its factorization.

840770741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 840770741 is about 28996.0469892018. The cubic root of 840770741 is about 943.8272888123.

The spelling of 840770741 in words is "eight hundred forty million, seven hundred seventy thousand, seven hundred forty-one".