634506143 has 2 divisors, whose sum is σ = 634506144. Its totient is φ = 634506142.

The previous prime is 634506031. The next prime is 634506161. The reversal of 634506143 is 341605436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634506143 - 2⁸ = 634505887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634506193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317253071 + 317253072.

It is an arithmetic number, because the mean of its divisors is an integer number (317253072).

Almost surely, 2^634506143 is an apocalyptic number.

634506143 is a deficient number, since it is larger than the sum of its proper divisors (1).

634506143 is an equidigital number, since it uses as much as digits as its factorization.

634506143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 634506143 is about 25189.4053721004. The cubic root of 634506143 is about 859.3009205266.

The spelling of 634506143 in words is "six hundred thirty-four million, five hundred six thousand, one hundred forty-three".