247664927 has 2 divisors, whose sum is σ = 247664928. Its totient is φ = 247664926.

The previous prime is 247664899. The next prime is 247664947. The reversal of 247664927 is 729466742.

It is a happy number.

247664927 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247664927 - 2⁶ = 247664863 is a prime.

It is a super-2 number, since 2×247664927² = 122675832131830658, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247664947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123832463 + 123832464.

It is an arithmetic number, because the mean of its divisors is an integer number (123832464).

Almost surely, 2^247664927 is an apocalyptic number.

247664927 is a deficient number, since it is larger than the sum of its proper divisors (1).

247664927 is an equidigital number, since it uses as much as digits as its factorization.

247664927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 47.

The square root of 247664927 is about 15737.3735737575. The cubic root of 247664927 is about 627.9930481535.

The spelling of 247664927 in words is "two hundred forty-seven million, six hundred sixty-four thousand, nine hundred twenty-seven".