627652809 has 27 divisors (see below), whose sum is σ = 1055512263. Its totient is φ = 358358112.

The previous prime is 627652807. The next prime is 627652813. The reversal of 627652809 is 908256726.

The square root of 627652809 is 25053.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 322382025 + 305270784 = 17955^2 + 17472^2 .

It is not a de Polignac number, because 627652809 - 2¹ = 627652807 is a prime.

It is a super-3 number, since 3×627652809³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (627652807) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 525517 + ... + 526709.

Almost surely, 2^627652809 is an apocalyptic number.

627652809 is the 25053-rd square number.

627652809 is the 12527-th centered octagonal number.

It is an amenable number.

627652809 is a deficient number, since it is larger than the sum of its proper divisors (427859454).

627652809 is an equidigital number, since it uses as much as digits as its factorization.

627652809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The cubic root of 627652809 is about 856.1959297805.

The spelling of 627652809 in words is "six hundred twenty-seven million, six hundred fifty-two thousand, eight hundred nine".