947820431 has 8 divisors (see below), whose sum is σ = 1011479040. Its totient is φ = 885040128.

The previous prime is 947820421. The next prime is 947820449. The reversal of 947820431 is 134028749.

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

It is not a de Polignac number, because 947820431 - 2¹⁴ = 947804047 is a prime.

It is a super-2 number, since 2×947820431² = 1796727138842051522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947820421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217346 + ... + 221663.

It is an arithmetic number, because the mean of its divisors is an integer number (126434880).

Almost surely, 2^947820431 is an apocalyptic number.

947820431 is a deficient number, since it is larger than the sum of its proper divisors (63658609).

947820431 is a wasteful number, since it uses less digits than its factorization.

947820431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439153.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 947820431 is about 30786.6924335824. The cubic root of 947820431 is about 982.2952003166.

The spelling of 947820431 in words is "nine hundred forty-seven million, eight hundred twenty thousand, four hundred thirty-one".