634490249 has 2 divisors, whose sum is σ = 634490250. Its totient is φ = 634490248.

The previous prime is 634490243. The next prime is 634490261. The reversal of 634490249 is 942094436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533286649 + 101203600 = 23093^2 + 10060^2 .

It is a cyclic number.

It is not a de Polignac number, because 634490249 - 2⁸ = 634489993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634490243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317245124 + 317245125.

It is an arithmetic number, because the mean of its divisors is an integer number (317245125).

Almost surely, 2^634490249 is an apocalyptic number.

It is an amenable number.

634490249 is a deficient number, since it is larger than the sum of its proper divisors (1).

634490249 is an equidigital number, since it uses as much as digits as its factorization.

634490249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 634490249 is about 25189.0898803430. The cubic root of 634490249 is about 859.2937454750.

The spelling of 634490249 in words is "six hundred thirty-four million, four hundred ninety thousand, two hundred forty-nine".