628761913 has 8 divisors (see below), whose sum is σ = 682001600. Its totient is φ = 576218448.

The previous prime is 628761907. The next prime is 628761919. The reversal of 628761913 is 319167826.

628761913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (628761907) and next prime (628761919).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-628761913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 628761913.

It is not an unprimeable number, because it can be changed into a prime (628761919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172173 + ... + 175786.

It is an arithmetic number, because the mean of its divisors is an integer number (85250200).

Almost surely, 2^628761913 is an apocalyptic number.

It is an amenable number.

628761913 is a deficient number, since it is larger than the sum of its proper divisors (53239687).

628761913 is a wasteful number, since it uses less digits than its factorization.

628761913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348111.

The product of its digits is 108864, while the sum is 43.

The square root of 628761913 is about 25075.1253835350. The cubic root of 628761913 is about 856.6999512841.

The spelling of 628761913 in words is "six hundred twenty-eight million, seven hundred sixty-one thousand, nine hundred thirteen".