785401663 has 2 divisors, whose sum is σ = 785401664. Its totient is φ = 785401662.

The previous prime is 785401609. The next prime is 785401667. The reversal of 785401663 is 366104587.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (366104587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 785401663 - 2¹³ = 785393471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785401667) 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, 392700831 + 392700832.

It is an arithmetic number, because the mean of its divisors is an integer number (392700832).

Almost surely, 2^785401663 is an apocalyptic number.

785401663 is a deficient number, since it is larger than the sum of its proper divisors (1).

785401663 is an equidigital number, since it uses as much as digits as its factorization.

785401663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 785401663 is about 28025.0185191732. The cubic root of 785401663 is about 922.6364446891.

The spelling of 785401663 in words is "seven hundred eighty-five million, four hundred one thousand, six hundred sixty-three".