861952123 has 8 divisors (see below), whose sum is σ = 892396080. Its totient is φ = 831556320.

The previous prime is 861952121. The next prime is 861952151. The reversal of 861952123 is 321259168.

861952123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 861952123 - 2¹ = 861952121 is a prime.

It is a super-2 number, since 2×861952123² = 1485922924688414258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861952121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26533 + ... + 49273.

It is an arithmetic number, because the mean of its divisors is an integer number (111549510).

Almost surely, 2^861952123 is an apocalyptic number.

861952123 is a deficient number, since it is larger than the sum of its proper divisors (30443957).

861952123 is a wasteful number, since it uses less digits than its factorization.

861952123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24077.

The product of its digits is 25920, while the sum is 37.

The square root of 861952123 is about 29359.0211519390. The cubic root of 861952123 is about 951.6875353772.

The spelling of 861952123 in words is "eight hundred sixty-one million, nine hundred fifty-two thousand, one hundred twenty-three".