611647 has 8 divisors (see below), whose sum is σ = 640832. Its totient is φ = 583200.

The previous prime is 611641. The next prime is 611657. The reversal of 611647 is 746116.

It is a happy number.

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 611647 - 2¹¹ = 609599 is a prime.

It is a super-2 number, since 2×611647² = 748224105218, which contains 22 as substring.

It is a Duffinian number.

611647 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611641) 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, 2122 + ... + 2392.

It is an arithmetic number, because the mean of its divisors is an integer number (80104).

2⁶¹¹⁶⁴⁷ is an apocalyptic number.

611647 is a deficient number, since it is larger than the sum of its proper divisors (29185).

611647 is a wasteful number, since it uses less digits than its factorization.

611647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its digits is 1008, while the sum is 25.

The square root of 611647 is about 782.0786405471. The cubic root of 611647 is about 84.8855206270.

The spelling of 611647 in words is "six hundred eleven thousand, six hundred forty-seven".