866969031 has 16 divisors (see below), whose sum is σ = 1217431040. Its totient is φ = 547274880.

The previous prime is 866969021. The next prime is 866969083. The reversal of 866969031 is 130969668.

It is a de Polignac number, because none of the positive numbers 2^k-866969031 is a prime.

It is a super-2 number, since 2×866969031² = 1503270601426157922, 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 (866969021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186546 + ... + 191136.

It is an arithmetic number, because the mean of its divisors is an integer number (76089440).

Almost surely, 2^866969031 is an apocalyptic number.

866969031 is a deficient number, since it is larger than the sum of its proper divisors (350462009).

866969031 is a wasteful number, since it uses less digits than its factorization.

866969031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7926.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 866969031 is about 29444.3378427840. The cubic root of 866969031 is about 953.5303660457.

The spelling of 866969031 in words is "eight hundred sixty-six million, nine hundred sixty-nine thousand, thirty-one".