634861077 has 12 divisors (see below), whose sum is σ = 850120320. Its totient is φ = 421429000.

The previous prime is 634861049. The next prime is 634861081. The reversal of 634861077 is 770168436.

It is not a de Polignac number, because 634861077 - 2⁶ = 634861013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634861037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187324 + ... + 190682.

It is an arithmetic number, because the mean of its divisors is an integer number (70843360).

Almost surely, 2^634861077 is an apocalyptic number.

It is an amenable number.

634861077 is a deficient number, since it is larger than the sum of its proper divisors (215259243).

634861077 is an equidigital number, since it uses as much as digits as its factorization.

634861077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3864 (or 3613 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 634861077 is about 25196.4496903830. The cubic root of 634861077 is about 859.4611176941.

The spelling of 634861077 in words is "six hundred thirty-four million, eight hundred sixty-one thousand, seventy-seven".