947469961 has 3 divisors (see below), whose sum is σ = 947500743. Its totient is φ = 947439180.

The previous prime is 947469953. The next prime is 947469977. The reversal of 947469961 is 169964749.

It is a happy number.

The square root of 947469961 is 30781.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 202179961 + 745290000 = 14219^2 + 27300^2 .

It is not a de Polignac number, because 947469961 - 2³ = 947469953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947469931) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15391 + ... + 46171.

It is an arithmetic number, because the mean of its divisors is an integer number (315833581).

Almost surely, 2^947469961 is an apocalyptic number.

947469961 is the 30781-st square number.

947469961 is the 15391-st centered octagonal number.

It is an amenable number.

947469961 is a deficient number, since it is larger than the sum of its proper divisors (30782).

947469961 is an frugal number, since it uses more digits than its factorization.

947469961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61562 (or 30781 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The cubic root of 947469961 is about 982.1741128797.

The spelling of 947469961 in words is "nine hundred forty-seven million, four hundred sixty-nine thousand, nine hundred sixty-one".