80634647 has 2 divisors, whose sum is σ = 80634648. Its totient is φ = 80634646.

The previous prime is 80634641. The next prime is 80634707. The reversal of 80634647 is 74643608.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80634647 - 2¹⁸ = 80372503 is a prime.

It is a super-3 number, since 3×80634647³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80634647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80634641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40317323 + 40317324.

It is an arithmetic number, because the mean of its divisors is an integer number (40317324).

Almost surely, 2^80634647 is an apocalyptic number.

80634647 is a deficient number, since it is larger than the sum of its proper divisors (1).

80634647 is an equidigital number, since it uses as much as digits as its factorization.

80634647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 80634647 is about 8979.6796713469. The cubic root of 80634647 is about 432.0233594336.

It can be divided in two parts, 806 and 34647, that added together give a palindrome (35453).

The spelling of 80634647 in words is "eighty million, six hundred thirty-four thousand, six hundred forty-seven".