947891131 has 12 divisors (see below), whose sum is σ = 1042777456. Its totient is φ = 860991120.

The previous prime is 947891101. The next prime is 947891149. The reversal of 947891131 is 131198749.

It is not a de Polignac number, because 947891131 - 2¹⁵ = 947858363 is a prime.

It is a super-2 number, since 2×947891131² = 1796995192456918322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947891101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184165 + ... + 189241.

Almost surely, 2^947891131 is an apocalyptic number.

947891131 is a deficient number, since it is larger than the sum of its proper divisors (94886325).

947891131 is a wasteful number, since it uses less digits than its factorization.

947891131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642 (or 6631 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The square root of 947891131 is about 30787.8406355496. The cubic root of 947891131 is about 982.3196235588.

The spelling of 947891131 in words is "nine hundred forty-seven million, eight hundred ninety-one thousand, one hundred thirty-one".