611321647 has 2 divisors, whose sum is σ = 611321648. Its totient is φ = 611321646.

The previous prime is 611321629. The next prime is 611321657. The reversal of 611321647 is 746123116.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 611321647 - 2¹⁵ = 611288879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611321617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305660823 + 305660824.

It is an arithmetic number, because the mean of its divisors is an integer number (305660824).

Almost surely, 2^611321647 is an apocalyptic number.

611321647 is a deficient number, since it is larger than the sum of its proper divisors (1).

611321647 is an equidigital number, since it uses as much as digits as its factorization.

611321647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 611321647 is about 24724.9195549753. The cubic root of 611321647 is about 848.7046692387.

The spelling of 611321647 in words is "six hundred eleven million, three hundred twenty-one thousand, six hundred forty-seven".