793609021861 has 2 divisors, whose sum is σ = 793609021862. Its totient is φ = 793609021860.

The previous prime is 793609021823. The next prime is 793609021867. The reversal of 793609021861 is 168120906397.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681111837025 + 112497184836 = 825295^2 + 335406^2 .

It is a cyclic number.

It is not a de Polignac number, because 793609021861 - 2²³ = 793600633253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 793609021799 and 793609021808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (793609021867) 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, 396804510930 + 396804510931.

It is an arithmetic number, because the mean of its divisors is an integer number (396804510931).

Almost surely, 2^793609021861 is an apocalyptic number.

It is an amenable number.

793609021861 is a deficient number, since it is larger than the sum of its proper divisors (1).

793609021861 is an equidigital number, since it uses as much as digits as its factorization.

793609021861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 793609021861 in words is "seven hundred ninety-three billion, six hundred nine million, twenty-one thousand, eight hundred sixty-one".