791861663 has 2 divisors, whose sum is σ = 791861664. Its totient is φ = 791861662.

The previous prime is 791861657. The next prime is 791861671. The reversal of 791861663 is 366168197.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 791861663 - 2⁴ = 791861647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (791861263) 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, 395930831 + 395930832.

It is an arithmetic number, because the mean of its divisors is an integer number (395930832).

Almost surely, 2^791861663 is an apocalyptic number.

791861663 is a deficient number, since it is larger than the sum of its proper divisors (1).

791861663 is an equidigital number, since it uses as much as digits as its factorization.

791861663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 791861663 is about 28140.0366559818. The cubic root of 791861663 is about 925.1591303535.

The spelling of 791861663 in words is "seven hundred ninety-one million, eight hundred sixty-one thousand, six hundred sixty-three".