947964121 has 8 divisors (see below), whose sum is σ = 1021151880. Its totient is φ = 874814592.

The previous prime is 947964109. The next prime is 947964137. The reversal of 947964121 is 121469749.

It can be written as a sum of positive squares in 4 ways, for example, as 1600 + 947962521 = 40^2 + 30789^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 947964121 - 2⁵ = 947964089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947965121) 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, 61635 + ... + 75463.

It is an arithmetic number, because the mean of its divisors is an integer number (127643985).

Almost surely, 2^947964121 is an apocalyptic number.

It is an amenable number.

947964121 is a deficient number, since it is larger than the sum of its proper divisors (73187759).

947964121 is a wasteful number, since it uses less digits than its factorization.

947964121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19115.

The product of its digits is 108864, while the sum is 43.

The square root of 947964121 is about 30789.0259832948. The cubic root of 947964121 is about 982.3448366052.

The spelling of 947964121 in words is "nine hundred forty-seven million, nine hundred sixty-four thousand, one hundred twenty-one".