628759613 has 4 divisors (see below), whose sum is σ = 628810908. Its totient is φ = 628708320.

The previous prime is 628759597. The next prime is 628759619. The reversal of 628759613 is 316957826.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 163149529 + 465610084 = 12773^2 + 21578^2 .

It is a cyclic number.

It is not a de Polignac number, because 628759613 - 2⁴ = 628759597 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 (628759619) 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, 4745 + ... + 35777.

It is an arithmetic number, because the mean of its divisors is an integer number (157202727).

Almost surely, 2^628759613 is an apocalyptic number.

It is an amenable number.

628759613 is a deficient number, since it is larger than the sum of its proper divisors (51295).

628759613 is a wasteful number, since it uses less digits than its factorization.

628759613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51294.

The product of its digits is 544320, while the sum is 47.

The square root of 628759613 is about 25075.0795213096. The cubic root of 628759613 is about 856.6989066850.

The spelling of 628759613 in words is "six hundred twenty-eight million, seven hundred fifty-nine thousand, six hundred thirteen".