836478641 has 2 divisors, whose sum is σ = 836478642. Its totient is φ = 836478640.

The previous prime is 836478593. The next prime is 836478653. The reversal of 836478641 is 146874638.

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., 609102400 + 227376241 = 24680^2 + 15079^2 .

It is a cyclic number.

It is not a de Polignac number, because 836478641 - 2¹⁰ = 836477617 is a prime.

It is not a weakly prime, because it can be changed into another prime (836478661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 418239320 + 418239321.

It is an arithmetic number, because the mean of its divisors is an integer number (418239321).

Almost surely, 2^836478641 is an apocalyptic number.

It is an amenable number.

836478641 is a deficient number, since it is larger than the sum of its proper divisors (1).

836478641 is an equidigital number, since it uses as much as digits as its factorization.

836478641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 47.

The square root of 836478641 is about 28921.9404777757. The cubic root of 836478641 is about 942.2184815899.

The spelling of 836478641 in words is "eight hundred thirty-six million, four hundred seventy-eight thousand, six hundred forty-one".