634550729 has 2 divisors, whose sum is σ = 634550730. Its totient is φ = 634550728.

The previous prime is 634550689. The next prime is 634550743. The reversal of 634550729 is 927055436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631165129 + 3385600 = 25123^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 634550729 - 2¹⁶ = 634485193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634550759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317275364 + 317275365.

It is an arithmetic number, because the mean of its divisors is an integer number (317275365).

Almost surely, 2^634550729 is an apocalyptic number.

It is an amenable number.

634550729 is a deficient number, since it is larger than the sum of its proper divisors (1).

634550729 is an equidigital number, since it uses as much as digits as its factorization.

634550729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 634550729 is about 25190.2903714904. The cubic root of 634550729 is about 859.3210474100.

The spelling of 634550729 in words is "six hundred thirty-four million, five hundred fifty thousand, seven hundred twenty-nine".