628149213 has 6 divisors (see below), whose sum is σ = 907326654. Its totient is φ = 418766136.

The previous prime is 628149209. The next prime is 628149217. The reversal of 628149213 is 312941826.

628149213 is a `hidden beast` number, since 628 + 1 + 4 + 9 + 21 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (628149209) and next prime (628149217).

It can be written as a sum of positive squares in only one way, i.e., 628103844 + 45369 = 25062^2 + 213^2 .

It is not a de Polignac number, because 628149213 - 2² = 628149209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628149217) 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 5 ways as a sum of consecutive naturals, for example, 34897170 + ... + 34897187.

It is an arithmetic number, because the mean of its divisors is an integer number (151221109).

Almost surely, 2^628149213 is an apocalyptic number.

It is an amenable number.

628149213 is a deficient number, since it is larger than the sum of its proper divisors (279177441).

628149213 is a wasteful number, since it uses less digits than its factorization.

628149213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69794363 (or 69794360 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 628149213 is about 25062.9051189203. The cubic root of 628149213 is about 856.4215890833.

It can be divided in two parts, 62814 and 9213, that added together give a palindrome (72027).

The spelling of 628149213 in words is "six hundred twenty-eight million, one hundred forty-nine thousand, two hundred thirteen".