800921079349 has 2 divisors, whose sum is σ = 800921079350. Its totient is φ = 800921079348.

The previous prime is 800921079347. The next prime is 800921079367. The reversal of 800921079349 is 943970129008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800769050449 + 152028900 = 894857^2 + 12330^2 .

It is a cyclic number.

It is not a de Polignac number, because 800921079349 - 2¹ = 800921079347 is a prime.

Together with 800921079347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 800921079296 and 800921079305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800921079347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400460539674 + 400460539675.

It is an arithmetic number, because the mean of its divisors is an integer number (400460539675).

Almost surely, 2^800921079349 is an apocalyptic number.

It is an amenable number.

800921079349 is a deficient number, since it is larger than the sum of its proper divisors (1).

800921079349 is an equidigital number, since it uses as much as digits as its factorization.

800921079349 is an evil number, because the sum of its binary digits is even.

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

The spelling of 800921079349 in words is "eight hundred billion, nine hundred twenty-one million, seventy-nine thousand, three hundred forty-nine".