634761137 has 2 divisors, whose sum is σ = 634761138. Its totient is φ = 634761136.

The previous prime is 634761133. The next prime is 634761163. The reversal of 634761137 is 731167436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 537126976 + 97634161 = 23176^2 + 9881^2 .

It is a cyclic number.

It is not a de Polignac number, because 634761137 - 2² = 634761133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634761137.

It is not a weakly prime, because it can be changed into another prime (634761133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317380568 + 317380569.

It is an arithmetic number, because the mean of its divisors is an integer number (317380569).

Almost surely, 2^634761137 is an apocalyptic number.

It is an amenable number.

634761137 is a deficient number, since it is larger than the sum of its proper divisors (1).

634761137 is an equidigital number, since it uses as much as digits as its factorization.

634761137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 634761137 is about 25194.4663964133. The cubic root of 634761137 is about 859.4160164613.

The spelling of 634761137 in words is "six hundred thirty-four million, seven hundred sixty-one thousand, one hundred thirty-seven".