828158641 has 2 divisors, whose sum is σ = 828158642. Its totient is φ = 828158640.

The previous prime is 828158609. The next prime is 828158671. The reversal of 828158641 is 146851828.

828158641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746437041 + 81721600 = 27321^2 + 9040^2 .

It is a cyclic number.

It is not a de Polignac number, because 828158641 - 2⁵ = 828158609 is a prime.

It is not a weakly prime, because it can be changed into another prime (828158671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414079320 + 414079321.

It is an arithmetic number, because the mean of its divisors is an integer number (414079321).

Almost surely, 2^828158641 is an apocalyptic number.

It is an amenable number.

828158641 is a deficient number, since it is larger than the sum of its proper divisors (1).

828158641 is an equidigital number, since it uses as much as digits as its factorization.

828158641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 43.

The square root of 828158641 is about 28777.7455857821. The cubic root of 828158641 is about 939.0841543790.

The spelling of 828158641 in words is "eight hundred twenty-eight million, one hundred fifty-eight thousand, six hundred forty-one".