947891967 has 24 divisors (see below), whose sum is σ = 1464640512. Its totient is φ = 540681600.

The previous prime is 947891951. The next prime is 947891977. The reversal of 947891967 is 769198749.

It is not a de Polignac number, because 947891967 - 2⁴ = 947891951 is a prime.

It is a super-2 number, since 2×947891967² = 1796998362206258178, 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 947891967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947891977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40159 + ... + 59232.

It is an arithmetic number, because the mean of its divisors is an integer number (61026688).

Almost surely, 2^947891967 is an apocalyptic number.

947891967 is a deficient number, since it is larger than the sum of its proper divisors (516748545).

947891967 is a wasteful number, since it uses less digits than its factorization.

947891967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99439 (or 99422 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 60.

The square root of 947891967 is about 30787.8542123351. The cubic root of 947891967 is about 982.3199123469.

The spelling of 947891967 in words is "nine hundred forty-seven million, eight hundred ninety-one thousand, nine hundred sixty-seven".