830638121 has 2 divisors, whose sum is σ = 830638122. Its totient is φ = 830638120.

The previous prime is 830638117. The next prime is 830638183. The reversal of 830638121 is 121836038.

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., 775344025 + 55294096 = 27845^2 + 7436^2 .

It is a cyclic number.

It is not a de Polignac number, because 830638121 - 2² = 830638117 is a prime.

It is not a weakly prime, because it can be changed into another prime (830638421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415319060 + 415319061.

It is an arithmetic number, because the mean of its divisors is an integer number (415319061).

Almost surely, 2^830638121 is an apocalyptic number.

It is an amenable number.

830638121 is a deficient number, since it is larger than the sum of its proper divisors (1).

830638121 is an equidigital number, since it uses as much as digits as its factorization.

830638121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 830638121 is about 28820.7932056007. The cubic root of 830638121 is about 940.0204164118.

The spelling of 830638121 in words is "eight hundred thirty million, six hundred thirty-eight thousand, one hundred twenty-one".