628989513 has 4 divisors (see below), whose sum is σ = 838652688. Its totient is φ = 419326340.

The previous prime is 628989503. The next prime is 628989539. The reversal of 628989513 is 315989826.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628989513 - 2⁵ = 628989481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628989503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104831583 + ... + 104831588.

It is an arithmetic number, because the mean of its divisors is an integer number (209663172).

Almost surely, 2^628989513 is an apocalyptic number.

It is an amenable number.

628989513 is a deficient number, since it is larger than the sum of its proper divisors (209663175).

628989513 is a wasteful number, since it uses less digits than its factorization.

628989513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209663174.

The product of its digits is 933120, while the sum is 51.

The square root of 628989513 is about 25079.6633350609. The cubic root of 628989513 is about 856.8033085765.

The spelling of 628989513 in words is "six hundred twenty-eight million, nine hundred eighty-nine thousand, five hundred thirteen".