947516306021 has 2 divisors, whose sum is σ = 947516306022. Its totient is φ = 947516306020.

The previous prime is 947516305969. The next prime is 947516306027. The reversal of 947516306021 is 120603615749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678555825025 + 268960480996 = 823745^2 + 518614^2 .

It is an emirp because it is prime and its reverse (120603615749) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 947516306021 - 2¹⁰ = 947516304997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947516306027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473758153010 + 473758153011.

It is an arithmetic number, because the mean of its divisors is an integer number (473758153011).

Almost surely, 2^947516306021 is an apocalyptic number.

It is an amenable number.

947516306021 is a deficient number, since it is larger than the sum of its proper divisors (1).

947516306021 is an equidigital number, since it uses as much as digits as its factorization.

947516306021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 947516306021 in words is "nine hundred forty-seven billion, five hundred sixteen million, three hundred six thousand, twenty-one".