1634663249 has 2 divisors, whose sum is σ = 1634663250. Its totient is φ = 1634663248.

The previous prime is 1634663221. The next prime is 1634663257. The reversal of 1634663249 is 9423664361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1329112849 + 305550400 = 36457^2 + 17480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1634663249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1634663269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817331624 + 817331625.

It is an arithmetic number, because the mean of its divisors is an integer number (817331625).

Almost surely, 2^1634663249 is an apocalyptic number.

It is an amenable number.

1634663249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634663249 is an equidigital number, since it uses as much as digits as its factorization.

1634663249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 44.

The square root of 1634663249 is about 40430.9689347164. The cubic root of 1634663249 is about 1177.9931533006.

The spelling of 1634663249 in words is "one billion, six hundred thirty-four million, six hundred sixty-three thousand, two hundred forty-nine".