634896149 has 2 divisors, whose sum is σ = 634896150. Its totient is φ = 634896148.

The previous prime is 634896139. The next prime is 634896181. The reversal of 634896149 is 941698436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590247025 + 44649124 = 24295^2 + 6682^2 .

It is a cyclic number.

It is not a de Polignac number, because 634896149 - 2¹² = 634892053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 634896097 and 634896106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634896139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317448074 + 317448075.

It is an arithmetic number, because the mean of its divisors is an integer number (317448075).

Almost surely, 2^634896149 is an apocalyptic number.

It is an amenable number.

634896149 is a deficient number, since it is larger than the sum of its proper divisors (1).

634896149 is an equidigital number, since it uses as much as digits as its factorization.

634896149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 634896149 is about 25197.1456518392. The cubic root of 634896149 is about 859.4769439729.

The spelling of 634896149 in words is "six hundred thirty-four million, eight hundred ninety-six thousand, one hundred forty-nine".