627389993 has 8 divisors (see below), whose sum is σ = 633027528. Its totient is φ = 621768064.

The previous prime is 627389977. The next prime is 627389999. The reversal of 627389993 is 399983726.

It can be written as a sum of positive squares in 4 ways, for example, as 135792409 + 491597584 = 11653^2 + 22172^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 627389993 - 2⁴ = 627389977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (627389999) 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, 85955 + ... + 92967.

It is an arithmetic number, because the mean of its divisors is an integer number (79128441).

Almost surely, 2^627389993 is an apocalyptic number.

It is an amenable number.

627389993 is a deficient number, since it is larger than the sum of its proper divisors (5637535).

627389993 is a wasteful number, since it uses less digits than its factorization.

627389993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803.

The product of its digits is 4408992, while the sum is 56.

The square root of 627389993 is about 25047.7542506309. The cubic root of 627389993 is about 856.0764086050.

The spelling of 627389993 in words is "six hundred twenty-seven million, three hundred eighty-nine thousand, nine hundred ninety-three".