611947 has 4 divisors (see below), whose sum is σ = 699376. Its totient is φ = 524520.

The previous prime is 611939. The next prime is 611951. The reversal of 611947 is 749116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 611947 - 2³ = 611939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43704 + ... + 43717.

It is an arithmetic number, because the mean of its divisors is an integer number (174844).

2⁶¹¹⁹⁴⁷ is an apocalyptic number.

611947 is a deficient number, since it is larger than the sum of its proper divisors (87429).

611947 is an equidigital number, since it uses as much as digits as its factorization.

611947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87428.

The product of its digits is 1512, while the sum is 28.

The square root of 611947 is about 782.2704136039. The cubic root of 611947 is about 84.8993965467.

The spelling of 611947 in words is "six hundred eleven thousand, nine hundred forty-seven".