947431213 has 8 divisors (see below), whose sum is σ = 978668568. Its totient is φ = 916490304.

The previous prime is 947431201. The next prime is 947431231. The reversal of 947431213 is 312134749.

It can be written as a sum of positive squares in 4 ways, for example, as 347524164 + 599907049 = 18642^2 + 24493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-947431213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947431283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67606 + ... + 80407.

It is an arithmetic number, because the mean of its divisors is an integer number (122333571).

Almost surely, 2^947431213 is an apocalyptic number.

It is an amenable number.

947431213 is a deficient number, since it is larger than the sum of its proper divisors (31237355).

947431213 is a wasteful number, since it uses less digits than its factorization.

947431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148223.

The product of its digits is 18144, while the sum is 34.

The square root of 947431213 is about 30780.3705793156. The cubic root of 947431213 is about 982.1607236069.

The spelling of 947431213 in words is "nine hundred forty-seven million, four hundred thirty-one thousand, two hundred thirteen".