634145077 has 4 divisors (see below), whose sum is σ = 635775660. Its totient is φ = 632514496.

The previous prime is 634145069. The next prime is 634145131. The reversal of 634145077 is 770541436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128165041 + 505980036 = 11321^2 + 22494^2 .

It is a cyclic number.

It is not a de Polignac number, because 634145077 - 2³ = 634145069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634145047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814708 + ... + 815485.

It is an arithmetic number, because the mean of its divisors is an integer number (158943915).

Almost surely, 2^634145077 is an apocalyptic number.

It is an amenable number.

634145077 is a deficient number, since it is larger than the sum of its proper divisors (1630583).

634145077 is a wasteful number, since it uses less digits than its factorization.

634145077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630582.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 634145077 is about 25182.2373311030. The cubic root of 634145077 is about 859.1378944103.

The spelling of 634145077 in words is "six hundred thirty-four million, one hundred forty-five thousand, seventy-seven".