830936221 has 2 divisors, whose sum is σ = 830936222. Its totient is φ = 830936220.

The previous prime is 830936219. The next prime is 830936237. The reversal of 830936221 is 122639038.

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., 579364900 + 251571321 = 24070^2 + 15861^2 .

It is a cyclic number.

It is not a de Polignac number, because 830936221 - 2¹ = 830936219 is a prime.

Together with 830936219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (830936521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415468110 + 415468111.

It is an arithmetic number, because the mean of its divisors is an integer number (415468111).

Almost surely, 2^830936221 is an apocalyptic number.

It is an amenable number.

830936221 is a deficient number, since it is larger than the sum of its proper divisors (1).

830936221 is an equidigital number, since it uses as much as digits as its factorization.

830936221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 830936221 is about 28825.9643550741. The cubic root of 830936221 is about 940.1328546943.

The spelling of 830936221 in words is "eight hundred thirty million, nine hundred thirty-six thousand, two hundred twenty-one".