634751077 has 2 divisors, whose sum is σ = 634751078. Its totient is φ = 634751076.

The previous prime is 634751063. The next prime is 634751113. The reversal of 634751077 is 770157436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630964161 + 3786916 = 25119^2 + 1946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634751077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634751057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317375538 + 317375539.

It is an arithmetic number, because the mean of its divisors is an integer number (317375539).

Almost surely, 2^634751077 is an apocalyptic number.

It is an amenable number.

634751077 is a deficient number, since it is larger than the sum of its proper divisors (1).

634751077 is an equidigital number, since it uses as much as digits as its factorization.

634751077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 634751077 is about 25194.2667486077. The cubic root of 634751077 is about 859.4114762911.

The spelling of 634751077 in words is "six hundred thirty-four million, seven hundred fifty-one thousand, seventy-seven".