947532981 has 8 divisors (see below), whose sum is σ = 1268182080. Its totient is φ = 629286272.

The previous prime is 947532977. The next prime is 947532991. The reversal of 947532981 is 189235749.

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 947532981 - 2² = 947532977 is a prime.

It is a super-2 number, since 2×947532981² = 1795637500165492722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 947532981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947532931) 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, 599676 + ... + 601253.

It is an arithmetic number, because the mean of its divisors is an integer number (158522760).

Almost surely, 2^947532981 is an apocalyptic number.

It is an amenable number.

947532981 is a deficient number, since it is larger than the sum of its proper divisors (320649099).

947532981 is a wasteful number, since it uses less digits than its factorization.

947532981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201195.

The product of its digits is 544320, while the sum is 48.

The square root of 947532981 is about 30782.0236664193. The cubic root of 947532981 is about 982.1958885007.

The spelling of 947532981 in words is "nine hundred forty-seven million, five hundred thirty-two thousand, nine hundred eighty-one".