634872443 has 2 divisors, whose sum is σ = 634872444. Its totient is φ = 634872442.

The previous prime is 634872401. The next prime is 634872451. The reversal of 634872443 is 344278436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634872443 - 2¹² = 634868347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634872443.

It is not a weakly prime, because it can be changed into another prime (634872943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317436221 + 317436222.

It is an arithmetic number, because the mean of its divisors is an integer number (317436222).

Almost surely, 2^634872443 is an apocalyptic number.

634872443 is a deficient number, since it is larger than the sum of its proper divisors (1).

634872443 is an equidigital number, since it uses as much as digits as its factorization.

634872443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 41.

The square root of 634872443 is about 25196.6752370228. The cubic root of 634872443 is about 859.4662466780.

The spelling of 634872443 in words is "six hundred thirty-four million, eight hundred seventy-two thousand, four hundred forty-three".