611311297 has 4 divisors (see below), whose sum is σ = 615709360. Its totient is φ = 606913236.

The previous prime is 611311277. The next prime is 611311307. The reversal of 611311297 is 792113116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611311297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611311277) 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 3 ways as a sum of consecutive naturals, for example, 2198823 + ... + 2199100.

It is an arithmetic number, because the mean of its divisors is an integer number (153927340).

Almost surely, 2^611311297 is an apocalyptic number.

It is an amenable number.

611311297 is a deficient number, since it is larger than the sum of its proper divisors (4398063).

611311297 is a wasteful number, since it uses less digits than its factorization.

611311297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398062.

The product of its digits is 2268, while the sum is 31.

The square root of 611311297 is about 24724.7102510828. The cubic root of 611311297 is about 848.6998795381.

The spelling of 611311297 in words is "six hundred eleven million, three hundred eleven thousand, two hundred ninety-seven".