634406407 has 16 divisors (see below), whose sum is σ = 677587680. Its totient is φ = 592883200.

The previous prime is 634406359. The next prime is 634406411. The reversal of 634406407 is 704604436.

It is a cyclic number.

It is not a de Polignac number, because 634406407 - 2¹⁵ = 634373639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634406497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153723 + ... + 157795.

It is an arithmetic number, because the mean of its divisors is an integer number (42349230).

Almost surely, 2^634406407 is an apocalyptic number.

634406407 is a deficient number, since it is larger than the sum of its proper divisors (43181273).

634406407 is a wasteful number, since it uses less digits than its factorization.

634406407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 634406407 is about 25187.4255730910. The cubic root of 634406407 is about 859.2558945756.

The spelling of 634406407 in words is "six hundred thirty-four million, four hundred six thousand, four hundred seven".