628077897 has 6 divisors (see below), whose sum is σ = 907223642. Its totient is φ = 418718592.

The previous prime is 628077883. The next prime is 628077929. The reversal of 628077897 is 798770826.

628077897 is a `hidden beast` number, since 628 + 0 + 7 + 7 + 8 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 412252416 + 215825481 = 20304^2 + 14691^2 .

It is not a de Polignac number, because 628077897 - 2⁴ = 628077881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628077817) 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, 34893208 + ... + 34893225.

Almost surely, 2^628077897 is an apocalyptic number.

It is an amenable number.

628077897 is a deficient number, since it is larger than the sum of its proper divisors (279145745).

628077897 is a wasteful number, since it uses less digits than its factorization.

628077897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69786439 (or 69786436 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 54.

The square root of 628077897 is about 25061.4823384412. The cubic root of 628077897 is about 856.3891770001.

The spelling of 628077897 in words is "six hundred twenty-eight million, seventy-seven thousand, eight hundred ninety-seven".