947217427 has 16 divisors (see below), whose sum is σ = 1049146560. Its totient is φ = 849508992.

The previous prime is 947217409. The next prime is 947217437. The reversal of 947217427 is 724712749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947217427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947217437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633693 + ... + 635185.

It is an arithmetic number, because the mean of its divisors is an integer number (65571660).

Almost surely, 2^947217427 is an apocalyptic number.

947217427 is a deficient number, since it is larger than the sum of its proper divisors (101929133).

947217427 is a wasteful number, since it uses less digits than its factorization.

947217427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862.

The product of its digits is 197568, while the sum is 43.

The square root of 947217427 is about 30776.8976181811. The cubic root of 947217427 is about 982.0868438343.

The spelling of 947217427 in words is "nine hundred forty-seven million, two hundred seventeen thousand, four hundred twenty-seven".