634843907 has 6 divisors (see below), whose sum is σ = 663646452. Its totient is φ = 607241492.

The previous prime is 634843841. The next prime is 634843927. The reversal of 634843907 is 709348436.

It is a happy number.

It is not a de Polignac number, because 634843907 - 2¹⁶ = 634778371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634843927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 599513 + ... + 600570.

It is an arithmetic number, because the mean of its divisors is an integer number (110607742).

Almost surely, 2^634843907 is an apocalyptic number.

634843907 is a deficient number, since it is larger than the sum of its proper divisors (28802545).

634843907 is a wasteful number, since it uses less digits than its factorization.

634843907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200129 (or 1200106 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 634843907 is about 25196.1089654732. The cubic root of 634843907 is about 859.4533695000.

The spelling of 634843907 in words is "six hundred thirty-four million, eight hundred forty-three thousand, nine hundred seven".