628143913 has 4 divisors (see below), whose sum is σ = 638790480. Its totient is φ = 617497348.

The previous prime is 628143899. The next prime is 628143949. The reversal of 628143913 is 319341826.

628143913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 319341826 = 2 ⋅159670913.

It is a cyclic number.

It is not a de Polignac number, because 628143913 - 2²⁹ = 91273001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628143713) 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, 5323195 + ... + 5323312.

It is an arithmetic number, because the mean of its divisors is an integer number (159697620).

Almost surely, 2^628143913 is an apocalyptic number.

It is an amenable number.

628143913 is a deficient number, since it is larger than the sum of its proper divisors (10646567).

628143913 is a wasteful number, since it uses less digits than its factorization.

628143913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10646566.

The product of its digits is 31104, while the sum is 37.

The square root of 628143913 is about 25062.7993847455. The cubic root of 628143913 is about 856.4191803949.

The spelling of 628143913 in words is "six hundred twenty-eight million, one hundred forty-three thousand, nine hundred thirteen".