861974523 has 12 divisors (see below), whose sum is σ = 1259065080. Its totient is φ = 568192416.

The previous prime is 861974489. The next prime is 861974543. The reversal of 861974523 is 325479168.

861974523 is a `hidden beast` number, since 8 + 6 + 197 + 452 + 3 = 666.

It is not a de Polignac number, because 861974523 - 2¹⁶ = 861908987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861974543) 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 11 ways as a sum of consecutive naturals, for example, 537261 + ... + 538862.

It is an arithmetic number, because the mean of its divisors is an integer number (104922090).

Almost surely, 2^861974523 is an apocalyptic number.

861974523 is a deficient number, since it is larger than the sum of its proper divisors (397090557).

861974523 is a wasteful number, since it uses less digits than its factorization.

861974523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076218 (or 1076215 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 861974523 is about 29359.4026335687. The cubic root of 861974523 is about 951.6957793061.

The spelling of 861974523 in words is "eight hundred sixty-one million, nine hundred seventy-four thousand, five hundred twenty-three".